Used to do it all the time at school xD first did it in primary school, it evolved from doing it with the lights off, to turning taps on and off 3 times too, and flushing the toilets 3 times etc, and usually to really shit up whoever is doing the dare, we'd hold the door shut tight from the outside so they couldn't get out xD

Don't forget Biggie Smalls:

http://www.southparkstudios.com/clips/155321/biggie-smalls

I have to ask. Who are these mysterious ghostly women with murder on their minds?

Well, if you believe any of that crap, I have a certain nigerian friend who could really use some help now. He is a prince you know ...

God's chosen people :D.

The way we played it when I was a kid was that if you looked in the mirror and said Bloody Mary repeatedly, one of the children would begin to see a red line on their neck. They would be the first to die.

this is what I found on Wiki:
http://en.wikipedia.org/wiki/Bloody_Mary_(folklore)

Looks like its either 3 or 13 times depending on the story.

Aldo the samething for Candyman:
http://en.wikipedia.org/wiki/Candyman_(film)

That was the one with the bees.

Biggie Smalls is still the onlyone I never try ;)

I remember hearing about that it grade school. Never tried it though.

http://xkcd.com/555/

I.. don't have anything else to say :P