I disagree with some of these glitches, the only one I can think of right now being the interrupted basher making an upward ramp - after all, if it was a glitch, how did it get there? Did the programmers make a mistake? It can be useful, if only very rarely.
Oh, and Clam, may I make a friendly suggestion and not double-post? (And anyone else for that matter; Clam's just the only one I saw do it.) Not that it matters, but it, uh, takes up more pages and thus more room when you do? At least I think so. I've been wrong before, I'll admit.