Came across this whilst looking at random blogs, and found it not only on Kanye West's blog (It's gotta be good then) http://www.kanyeuniversecity.com/blog/, but also here http://www.todayandtomorrow.net/2009/04/06/mosh-pits-by-dan-witz/....
It's pretty cool, Dan Witz is a street artist, and if you have a look at his webpage, hes got so many different sections of work, all amazing. take a look at this art on the streets of Brooklyn... http://www.danwitzstreetart.com/kilroy08_2_5.html
He captures the movement and energy so well that it looks like a photograph, I especially liked how he compared the moshpit to fighting dogs.. just like the cliche- it's a dog eat dog world out there...