Sonic Spinball is nothing but a glitch overall. =P j/k It was a fun game.
Hmm, only two glitches come to mind for me. The first one, I have no idea how I did it, but it was in the SNES version of The Lion King. I've done this maybe twice. In the first level, it's like if you roll a certain way at the beginning, then you have invincibility for the rest of the game, unless you get out (not from hits, but from stuff like...falling off a cliff).
The other glitch that used to drive me mad, is one from Ultimate Mortal Kombat III (SNES version). One character I really liked using was Rain since he had that roundhouse kick. I used to use his lightning move, which knocks the computer upwards. I'd then run over, and before the computer's player falls to the ground, I'd roundhouse and keep going. Unfortunately, if you keep that up, the game would freeze on you.