Here's one from Abe's Oddysee: There's one level in Zulag 3, I think, that you can get the Shrykull then leave without using it, then there's another room which has floating bombs and electric walls. If you walk into one of the electric walls, then use the shrykull before you dissappear, Abe becomes invincible to electric walls
This also works in Abe's Exoddus, just a little bit different. It makes it so that Abe can be shot or squashed or killed in any other manner, then he can just get back up again and move on. He behaves really weird, though, after he's been 'killed'.
