Physics Paper of the week: Collective Motion of Moshers at Heavy Metal Concerts

Quoting from the end of the paper:

"Source code and a phase diagram generating Python script are available under the M.I.T. license on github.com at https://github.com/mattbierbaum/moshpits . An interactive Javascript version of the simulation is available at http://mattbierbaum.github.com/moshpits.js ."