What are your favorite funny videos?

Hey Everyone!
This thread is for everyone to post their favorite internet "Funny Videos"
What are the videos you usually watch to either "cheer you up", or make you laugh?

Here are a few of mine:

[video=youtube]http://www.youtube.com/watch?v=ryzUSut4t1M[/video]

[video=youtube]http://www.youtube.com/watch?v=cIwTYL1fwJk[/video]

Okay, Post away!