Azie Osborne was browsing guitars in the back of a music store when the free workshop instructor needed a volunteer. “You, sir,” the customer in the back, “come up here and show the class how to play basic power chords. You look like you know some rock music.” Azie walked to the front of the store.

“I know some rock music. I’m Aussie Osborne. I’ve been listening to Tony Iomi play power chord since he invented the heavy metal sound in 1970.” What happened next? Silenced 20 students. It was Saturday afternoon, December 7th, 2019 at Melody Music in Burbank, California. The independent music store had been serving local musicians for 20 years, and one of their most popular offerings was free Saturday workshops covering various topics: beginner guitar, songwriting, music theory, equipment basics. Today’s workshop was titled Introduction to Rock Guitar Power Chords and Metal Basics, led by Jake Sullivan, a 32-year-old guitar instructor who taught private lessons at the store during the week and led weekend workshops. Jake was a solid player with good teaching skills, and his workshops usually attracted 15 to 20 aspiring guitarists. The store’s layout had the workshop area set up near the

front with folding chairs arranged in a semicircle facing Jake’s demonstration station. Behind the workshop area, the store extended back with rows of guitars hanging on walls, amplifiers on display, and various equipment for sale. About 20 students had shown up for today’s workshop, mostly teenagers and young adults learning guitar with a few older hobbyists mixed in.

They sat in the folding chairs taking notes as Jake covered the fundamentals of power chords, the two note formations that form the backbone of rock music. In the back of the store, browsing the vintage guitar section, was an older gentleman who looked to be in his early 70s. He wore jeans, a Black Sabbath t-shirt, and a baseball cap.

He’d been looking at guitars for about 20 minutes, occasionally picking one up to examine it, but mostly just browsing casually. What Jake didn’t know was that the customer in the back was Azie Osborne, and he was there because his guitar tech had recommended Melody Music as having good vintage equipment.

Azie had driven over himself on a Saturday afternoon to browse without any fanfare or attention. Jake was now about 45 minutes into the workshop, and he’d covered the theory behind power chords, how they’re formed, why they work in rock music, their history, and the genre. Now, he wanted to move into practical demonstration.

Power chords are the foundation of rock and metal guitar. Jake explained to his students, “They’re simple, just a root note and a fifth, but they’re incredibly powerful when played through distortion.” He demonstrated on his guitar, playing a basic power chord progression. The students nodded, understanding.

Now, what makes power chords so important to metal specifically, Jake continued, is that they sound heavy. The lack of the third note means there’s no major or minor quality, just pure power and ambiguity. That’s why they’re perfect for the dark, heavy sound of metal. He played a heavier example using more distortion. Black Sabbath basically built their entire sound on power chords.

Jake said Tony Iomi, their guitarist, was one of the pioneers of using power chords to create that heavy metal sound. Simple technique, massive impact. In the back of the store, Azie looked up from the guitar he was examining. Now, I want to make sure everyone understands the basic fingering, Jake said.

Let me get a volunteer to demonstrate, someone who can show the class what we’ve been talking about. He looked around at his students. Most of them looked nervous. They weren’t confident enough to demonstrate in front of the class yet. Jake noticed the older customer in the back who’d been browsing during the workshop.

The guy was wearing a Black Sabbath shirt, clearly a rock fan. Maybe he played guitar. You, sir, Jake called out to the back of the store. the customer in the back. You’ve been here during the whole workshop. Come up here and show the class how to play basic power chords. You look like you know some rock music.

The older man sat down the guitar he’d been examining and walked toward the front of the store. As he got closer, some of the students started looking at him more carefully. A couple whispered to each other. He reached the workshop area. Jake handed him a guitar. “Thanks for volunteering,” Jake said.

“What’s your name?” “John,” the man said. “John, great. So, I’ve been teaching these students about power chords and their importance in metal guitar. Can you demonstrate a basic power chord progression for the class? I can try, the man said. But I should mention something first. What’s that? Jake asked.

I’m Ozie Osborne, the man said. And I don’t actually play guitar. I’m a singer. But I’ve been listening to Tony. I only play power chords since he invented the heavy metal guitar sound in 1970. So, I know what they should sound like. I just can’t play them myself. The workshop area went completely silent. Jake stared.

Several students gasped. One dropped his notebook. You’re Jake couldn’t finish the sentence. Aussie. Yeah. The man confirmed. And you just called me up to demonstrate guitar technique, which is awkward because I’m not a guitarist. But I’ve watched Tony Iomi play power chords for 50 years, so I can talk about them even though I can’t play them.

The students were frozen, not sure if this was real. Jake felt his face burning. “Mr. Osborne, I’m so sorry. I didn’t recognize you. I just saw someone in a Black Sabbath shirt and assumed that I could play guitar,” Ozie finished. “Natural assumption, but no, I’m the singer. Tony’s the genius on guitar. I just stand there and sing.

” “I’m incredibly embarrassed,” Jake said. “Why?” Aussie asked. “You were teaching a workshop. You wanted to volunteer. You asked someone who you thought might be able to help. You couldn’t have known I can’t actually play. But I called you up in front of everyone, Jake said. And now I’m here, Aussie said.

So let’s make it useful. You want to teach these students about power chords and metal guitar. I can’t demonstrate playing them, but I can talk about what it’s like to perform with someone who plays them better than almost anyone. The students were starting to realize this was actually happening.

Azie Osborne was standing at the front of their beginner guitar workshop. You said Tony Iomi invented the heavy metal guitar sound. One student said tentatively. Can you talk about that? I can talk about watching him create it. Azie said we started Black Sabbath in 1968. Tony had lost his fingertips in a factory accident, so he had to tune down to reduce string tension that made everything sound lower and heavier.

Jake was listening intently now, realizing he was getting a firstirhand history lesson. And Tony started using power cords. heavily, Azie continued, because his injured fingers made complex chords harder to play. So, he focused on these two note formations that sounded massive through distortion. So, the metal guitar sound was partly because of his injury, a student asked.

The injury led to the tuning, Azie explained. The tuning led to the heavier sound. Tony’s genius led to figuring out how to make that heavy sound into actual music. It all connected. That’s not in any of the books I’ve read, Jake admitted. Because it’s the kind of detail you only know if you were there, Aussie said.

The books talk about Black Sabbath’s heavy sound like it was a conscious artistic choice. It was partly that, but it was also Tony working around a disability and discovering that his limitations created something new. Another student raised her hand. “Mr. Osborne, what’s it like to perform with someone playing power chords that heavy?” “Incredible,” Azie said.

When Tony hits a power chord through a Marshall stack, you feel it in your chest. The stage vibrates. Your organs shake. It’s physical, not just sonic. That’s what power chords do in metal. There is much about physical impact as musical notes. Jake found his voice. Mr. Osborne, can I ask? When Tony was developing that sound, did he know he was creating something revolutionary? No, Aussie said.

We were just trying to sound different from other bands. We wanted to be heavier, darker, scarier. Tony experimented until we found sounds that worked. We didn’t know we were inventing metal guitar. We were just trying to make music that matched how we felt. Dark, heavy, aggressive. So, the power chord techniques you use weren’t planned? A student asked.

Nothing was planned. Azie said Tony would try something. If it sounded heavy, we’d keep it. If it didn’t, we’d try something else. The power cord approach emerged because it sounded right for what we were trying to do. Jake was taking metal notes. That’s a very different narrative from how I’ve been teaching metal guitar history.

You’ve probably been teaching the cleaned up version, Azie said. The version where visionary musicians consciously create new genres. The reality is messier. Injuries, experiments, accidents that sound good. Finding techniques that work for your specific situation. For the next 30 minutes, the guitar workshop became something completely different.

Jake would explain the technical aspects of power chords, fingering, theory, application. Azie would explain what it was like to watch Tony Iomi use those techniques to create Black Sabbath sound. The flat fifth interval, Jake explained, creates that dark, unstable sound. We called it the evil sound, Aussie said.

Tony would play that interval and it sounded like horror movies. We built entire songs around making people feel uneasy. The palm muting technique, Jake demonstrated, is crucial for metal rhythm. Tony’s palm is always on the strings, Aussie confirmed. That’s how he gets that chunky percussive sound. Watching him play, his right hand barely moves, but the sound is massive.

The students were riveted. They were getting technical instruction from Jake and contextual history from someone who’d been on stage with one of the inventors of metal guitar. Can I ask something? A student said, “If you can’t play guitar, how did you contribute to the music?” “Vocals and lyrics,” Azie said.

Gizer wrote most of the lyrics, but I’d work with him on melody and phrasing. My job was to figure out how to sing over what Tony was playing. How to match the heaviness with my voice. “So, you’re learning guitar technique by listening rather than playing?” Jake asked. “I’ve learned what works by watching Tony for 50 years,” Azie said.

I can hear when someone plays power chords wrong, even though I can’t play them myself. I know what they should sound like because I’ve heard them done perfectly thousands of times. After the workshop officially ended, students surrounded Azie with questions. Jake waited until the crowd cleared, then approached. Mr.

Osborne, thank you for turning my embarrassing mistake into a learning opportunity. I called you up to demonstrate something you can’t actually do and it turned into something better than a demonstration. Azie said, “These students got theory from you and context from me. That’s more valuable than watching someone play power chords.

” “Can I ask why you didn’t identify yourself when you first came in?” Jake said. “Because I wanted to browse guitars without anyone making a fuss,” Ozie admitted. “I come to small stores specifically because I can usually walk around without being recognized. The baseball cap and Black Sabbath shirt actually works as camouflage.

People assume I’m just a fan. Well, your camouflage failed today, Jake laughed. Because you put me on the spot, Azie said, but it worked out. Your students learned something. I got to talk about Tony’s genius, and you’ve got a good story for future workshops. What happened next changed how Jake taught guitar.

He still covered the technical aspects of power chords and metal guitar, but he started including the context, the injuries, experiments, and accidents that led to the techniques. He changed his workshop description to include, “Learn the technical foundations of metal guitar and hear stories about how these techniques were actually developed by the musicians who created them.

” 3 weeks later, Azie sent Jake a message through the store. He was gifting the vintage guitar Azie had been looking at when Jake called him up. The note said, “For the guitar teacher who taught me about teaching. Sometimes the best lessons come from admitting what you don’t know.” Azie Jake kept the guitar in the store’s workshop area, not for sale, with a sign explaining its story.

Students would ask about it, and Jake would tell them about the day he accidentally called Azie Osborne up to demonstrate guitar technique, and how Azy’s honesty about not being able to play led to a better lesson than any demonstration could have provided. The story became legend among guitar teachers, not as a cautionary tale about embarrassing mistakes, but as a reminder that expertise comes in different forms, that context matters as much as technique, and that sometimes the person browsing in the back of your store can teach your students more than you can, even if they can’t actually play the instrument you’re teaching. If this story about different forms of expertise, the value of contextual knowledge alongside technical skill and remembering that understanding music and playing music are both valid forms of knowledge resonated with you. Make sure to subscribe and hit that like button. Share this video with anyone who needs to remember that learning comes from

unexpected sources. Have you ever been called on to demonstrate something you couldn’t actually do? Let us know in the comments. And don’t forget to ring that notification bell for more wholesome stories about embracing unexpected teaching moments.