Oh man, I remember this one:
Spongebob Squarepants: The Movie Game. There was a level, I believe it was called "Three... Thousand Miles to Shell City". There was one point, where you had to jump across a 'goo' lake using trampolines and small islands.
Off to the left there was one random island, and if you jumped off of this island, at the right angle, into the right spot in the goo, you'd fall through the ground, and into the empty space.
Oh man, that was the best. You couldn't do much, aside from spin. But the colours would blend, and mix, and they'd take little like pictures of where you were fractions of a second earlier and overlap them, it looked trippy. I could do that glitch on command, it was awesome.