Expressing one's emotion through dance at a heavy rock concert. Using violent and frenzied movements whilst showing complete respect and courtesy to those around you. You're all there for the same reason- enjoyment and fun.
-not being a douche bag.
*at a local show*
bob- hey, see that meat head slamming into everyone in the pit?
jim- yeah, what an asshole.
bob- let's get our posimosh on and enjoy the rest of the show with our friends.
jim- good plan, I have respect for those around me.