I found a funny glitch on Spyro: Year of the Dragon for PsX.
To activate it, do the following:

Go to any world with lava or any other kind of stuff that makes you hurt yourself. I prefer to do this in Molten Crater in the Sunrise Spring homeworld at the beginning of the level, but it can be done anywhere. Jump into the lava, keep burning yourself untill Sparx is gone. What you want to do now is hit the ava one more time, but as you hit the lava, quickly pause the game. You'll feel the controller shake if you did this correctly. Now, don't unpause the game, select 'Exit world'. You'll return...