Leave it to my alma mater, Cornell University, to study Mosh Pits at Heavy Metal concerts and come up with a formula for the activity of "a Mobile Active Simulated Humanoid, or MASHer":
Here are some other diagrams representing how humans act like gaseous particles:
Repulsion? Gaseous Particles? I think the study could also explain the smell at Heavy Metal concerts. Seriously.
Collective Motion of Moshers at Heavy Metal Concerts
by Jesse L. Silverberg, Matthew Bierbaum, James P. Sethna, and Itai Cohen
Laboratory of Atomic and Solid State Physics and Department of Physics, Cornell University, Ithaca NY 14853, USA
(Dated: February 11, 2013)