I don't hope to spoil teh fun, but, have you been recently fooled by screamers who claim that you just need to look or some sort of gimmick and then flash a scary/ funny image?
Here are some sites for screamers, in case you need a shock
http://youtube.com (they actually have some , like FIND RONNY(or some kid's name)
The most that got the crap outta me was the one at winterrowd who claimed that you just have to play the maze game and then, BOOM!
Anyways, good luck!