Try to think back to the times in video games that made you lol. Whether it was a funny movie, a small joke, some sort of glitch, or something that wasn't even meant to be funny (such as Peach's blonde moments). For instance, just a little while ago while, playing The Legend of Zelda: The Windwaker, I started laughing when Link had placed the orbs/pearls/whatever you want to call those round things in all the statues.
Well, first of all he thought the statue would blow up because it started shaking violently! He had dived under the grass for shelter, plugging his ears, only to find that it simply stopped shaking. So he walked back up to the statue. THEN it blew up.
Link flew off somewhere through the air, screaming, and the scenerio changes to the Temple of the Gods Tower thingy rising out of the sea. It's huge, magnificent, and the music is in a serious and gallant tone. The movies really focuses on the tower for a while. Suddenly, you hear Link screaming, and he falls from the sky straight into the tower wall with a -SPLAT-. He stays there for a little while, his face in pain, the music suddenly turning a bit childish at that point, and then he slides down the wall into the sea. Acting as though that never happened, the heroic music starts playing again as the tower rises up ever further.
Oh that was great. The King of Red Lions just comes over and shakes his head. Hero of time my ear! Haha! Okay, you tell one!