Holy sh@t!

Never seen anything like this - my gawd I bet that hurt...
 
http://www.youtube.com/watch?v=K2GLrZSTsI8&feature=related

Ya that ones craaaazy.  I'm sure that thing came out with quite the velocity.  I bet hes glad it was a flat piston instead of a sharp peice of metal to cut his hand off.

Did that guy just lose his hand?

It was a NOS explosion.  Blow the glove off his hand. 

I think it blew his glove off...     with his hand still in it.

I had seen this the other day. Pretty f-n amazing! Hard to tell what kind of damage he sustained. Looks like it hurt like hell!!!!

In the comments below a guy said it was a NOS expl and he was out racing the next day. It was the air duct that blew off and hit him.

We've went through this before.  They cut the video to make it look like his hand is gone, if you watch/find the full video, you see his hand.