Here's a little advice for you: never sleep near friends that carry firecrackers and a camera (unless you want to end up on a funny video over the Internet of course)
In case you were thinking of this prank: don't! Yes it sounds like a good idea to make a copy of your own ass, but it will only make people laugh when they see your stupidity
As you've seen it before also, George W. Bush is one unique source of humor when he is addressing to people (and to make it even worse when he's doing it in a public speech) so here it is: a compilation of his best performances for 2006.
In the 1960s, Dr. Peter Witt gave drugs to spiders and observed their effects on web building. Watch how spiders react to various chemicals and see the similarities with humans