Greatest Web Video Ever

User Participation Friday
There are an infinite number of hysterical web videos out there but the popularity scale has certainly soared on a few of them. So I'm requesting from you to post links to the greatest web videos you've witnessed. Here are a few example of the sort of thing I'm talking about:
David Hasslehoff - Hooked On A Feeling
Practice Katana
QVC Ladder Mishap
Grape Stomper - my personal favorite
Backflip Nunchucks - possible runner up
Cat Attacks Baby

I'm not looking for any Star Wars kids redux videos.. just the best of the best.