The greatest thing I've ever seen (lately) is this excerpt from "Multiple SIDosis," a famous short from 1970 by outsider filmmaker Sid Laverents that was just posted on-line two weeks ago. Laverents uses ingenious home-brew technology to create a cinematic one-man band performance of the bouncy tune "Nola" on such instruments/noise-makers as the metronome, ukulele, banjo, ocarina, jews harp, beer bottles, pipes, and cymbal, while sometimes inexplicably dressed like Mickey Mouse. Restores my faith in humanity.
There are full-length versions of "Multiple SIDosis" on the YouTubes of poopy quality. This is just a minute-and-a-half, but it looks really good: