Who said cellists are stuffy?
 

This really needs no introduction.

Another non-stuff cellist

I was sure that this was the video I was going to find here.

See also Apocalyptica (which are different cellists than seen above):

More for ya courtesy of "melo-m"

Who needs an instrument?

Man, I love these! I used to play cello when I was younger and would go to town on it like some of these guys do. My fav. was to play "What Do You Do With A Drunken Soilder" as loud as I could while also screaming the lyrics at the top of my lungs... good times!

P.S. love all this long hair head shakin stuff while they're playing!

Dammitall, there is something seriously wrong with that dude. Nice find.