Some things are just funny!

Why do some things just make us laugh? Ive watched http://www.youtube.com/watch?v=pv3Kl0lqAwA this video 3 times and it just make me laugh every time.

Here's one more:

http://www.southflorida.com/events/sfl-scaredsanta,0,2245506.photogallery?index=1