"I've been a part of concerts before, but have never given one of my own," Autor says, drilling a hole in the rock. He soaks the drill bit for a moment, and soaks the rock as well with a sponge. "Truth be told, that would be terrifying--but thrilling! Here, I'll set up the laptop."

He climbs down the ladder, leaving the drill on top, and calls his laptop out of his sylladex. Then he boots up the computer, tapping his foot. "It shouldn't take long," he says, and it doesn't. Soon he's playing a collection of piano music, which comes out slightly tinny from the laptop's speakers.