The strangest thing happened the other day. I was in Slig Barracks, part 2 of Block 4, and when I pressed the Circle button to get out a grenade to throw, one of 3 things happened:
1. Abe disappeared and was replaced with a square of pixelated mess, the grenade deactivated, and I couldn't move Abe at all.
2. Same as above, but then the grenade blew up and I couldn't stop it.
3. The game froze for half a second, and then everything was fine.
Very weird. If I had a screenshot, I'd post it, but I don't.
EDIT: Has anyone mentioned the glitch in Abe's Oddysee that only happens if you use an emulator?
When I get to RuptureFarms II, the ring in Zulag 1 (which reveals a secret passage) is gone, as well as the one at the end of the Board Room. This glitch is so bad that it stops you from finishing the game, and can only be avoided by using the level select cheat.