A few years ago, I ran in a half marathon that had a music theme and there were bands playing along the course. At mile 12, there was this kid, about 12, with just an electric guitar and an amp. He repeatedly played a medley of two riffs, I think they were the only songs he knew, Deep Purple Smoke on the Water and this, and dammit if it didn’t help me finish the race.
Heart - "Barracuda" (1977)