Here in New York City, we see and hear all kinds of stuff in the subway—but we haven't seen anything quite like Rafa Budu.

Watch as Budu plays a song at a rapid pace on a train in his native Chile—and suddenly starts smashing his head against the wall behind him ...

... giving a whole new meaning to, yes, head banging.

There are plenty of Rafa Budu videos on YouTube, by the way. Enjoy, if you can.