"It's Gonna Rain (Pt 1)" and "It's Gonna Rain (Pt 2)", by Steve Reich. This is one of those accidental discoveries that changed the future of music. The surprising thing about it, though, is how damn danceable it is, considering that there isn't a
doof doof to be found. Listening to it this afternoon I couldn't sit still. Of course, it's just possible that that might have been in some small part due to the day's serial caffienation.