I think mine would be Zelda Oot when I picked up a box and then when I fell off a small platform, the box got stuck on Link's body. No joke, he was pretty much wearing the box.
There was also a time in Spore, that game is packed with glitches by the way, I started out in the water and when I went onto land, that giant sea monster thing ate me. I could never play normally again without the cheat to get rid of the sea monster dude. (Not like that game is that good anyway…)
Also, I downloaded Zelda Oot on my computer and the text in the game was all messed up, I thought it was BEN! But it turned out to be a glitch…
What's the weirdest glitch you've ever seen?