For those who don't know Les, fun fact: he once audition for Metallica and they denied him based solely on the fact that he is far too damn good for them.
I've seen tons of bands live (Slayer, Megadeth, Sepultura, Napalm Death, Cannibal Corpse, Korn, System of a Down, Pantera, Slipknot, Lamb of God - to name a few). But Primus is the band that showed me first hand the largest mosh pit I've ever seen, and it was to this mighty cute song:
Nicole, one of the guitarist, is someone I follow on YouTube. I linked to her doing a metal cover song earlier in this thread. This is her full band. The guest solo at the end is killer!