I am indebted to MetaFilter user Slarty Bartfast for posting a link to this masterpiece in a thread about a (completely different) cover version of Metallica's Enter Sandman.
Granted, it looks as if it's going to be very silly, but somehow it really isn't. Just keep an eye on the drummer. (You'll soon realise which of them I mean by that. Trust me on this.)
Apparently this has been on the internet for years, but I somehow hadn't clapped eyes on it until earlier this evening.
[Via MetaFilter]