Focus

Focus
Focus is a Flash game made by Wally Bartus on Albino Blacksheep. This game makes you focus on a black and white picture, making you believe your vision will be distorted. However, after about 10 seconds, a picture of an overweight woman showing her rear end appears along with a fart sound. Then, some text appears saying "Gotcha, didn't I? Hahaha!"

Link
NOTE : The following animation contains a screamer.
 * albinoblacksheep.com/flash/focus