There was this campaign by Nokia here, in which they presented the life of unusual people, like a man who only walked backwards, a man who thought he was invisible (he went to a ping pong game and started playing with the ball in front of the players), and they conected in some way with the cell phone, the man walking backwards see the cell phone on a store and walks foward to see it, for the first time on his life, the invisible man discovers he is not invisible when they take a pic of him with the cell phone. It's not "ha ha" funny, but it was pure genius.
There's the famous ad, with an elderly couple sleeping on a dark room, and a bug starts to make some noise, you know, "bzzzz", and the old man gets a can and starts to spray to kill the bug, and they turn on the lights, and there's spray paint all over the wall.
The bizarre ad by Sega, with the poor ping pong player in China that played with his ears, and since he was a kid he was pulling his ears to make them big... cant explain it, you gotta see it to belive it.
And another one, I think it was a X-box ad, which featured a woman during labor work, and she shoots out the baby out of the window, and it flies over the sky, screaming, and it gets older, and its a kid, then a teen, then a man, always flying thru the sky, screaming, and when he gets old he lands "puf!" on a open coffin. And it ends with "Life is short" on the screen. Thought that was cool.