The first clip below is about a poor unsuspecting chap who gets in the back of a taxi, the driver is actually a stunt driver and takes him on the ride of his life. I quite nearly wet myself laughing at the passengers reaction.

The second clip is actually a series of various pranks, my personal favourite has got to be the exploding cigarette guy around 0:59 seconds. My brother and I used to regularly booby trap my mothers ciggies and watch in delight as they used to blow out in cartoon-scale hilarity.