There's this video called "Two Girls, One Cup" that's been making the rounds for a while on the internet that I only just heard of. An entire video genre has sprung up around it of people's reactions to watching it for the first time (and presumably only time). I warn you now, DO NOT CLICK ON THIS LINK, but if you just have to, set up a video camera so you can record your reaction. Two Girls, One Cup.

Remember, I warned you not to watch it. Look up "two girls one cup reactions" to find some funny responses.