Pokemon XD
That game title always makes me think that the developers are laughing at the game...as oppoesd to DX, which brings up something that made me "poop a little" in a bad way.
--Sonic's forehead in Sonic Adventure DX
Seriously, man. What was up with that. Now then, the good list.
--Watching the intro to Melee for the first time
--Watching the intro to Katamari Damacy every time
--Watching the link that PL posted and realizing that I now need to pick up MGS2
--The ending cutscene of Meta Knight's revenge in Kirby Super Star Ultra
--Playing as Darth Vader in the first level of "Force Unleashed". This may not be a poop-worthy moment for everyone, but for me it was. The sheer awesomeness of throwing Wookies off of a bridge using the force was amazing.
--The first time I played Pokemon Silver
--The first time I ever saw a Falcon Punch