What are your favorite demos/bootlegs?

Some of my favorites:

• Snapping Turtles (Bangs Demo) - I like the lyrics better than album.
• Man It's So Loud in Here (Demo 1) - I prefer this arrangement over album.
• Half a Boy - I'm a little mad this one was never on an album. It deserved a spot in Misc T or Then at least.
• We Just Go Nuts at Christmastime - Pleasantly depressing.