"Back in the 70s before mosh pits we used to 'pogo', until one night in late '79 Henry Rollins dropped his keys at a Bad Brains show in Hammersmith Apollo (it's a little-known fact that Henry Grew up in Fulham). Henry was a big, testosterone filled guy (still is!) and quickly became frustrated at all the tartan DIY custom pants and DMs obscuring the view from his bunch of keys and didn't enjoy the prospect of having to sleep under Hammersmith Fly-over AGAIN (his mother was a Night Nurse addict and very heavy sleeper).
Soon after Henry spotted his beloved bunch get hoofed along the floor and out of sight by some fat prick wobbling ecstatically during 'Pay To Cum' and he saw red. He picked the poor cunt up by the leg and swung him and all his gelatinous weight straight toward the rest of the spotty posh crowd (door tax was £10, a fortune back then) knocking the kids arse over tit into each other and creating the first ever mosh pit! Henry never reclaimed his keys that night (some stupid twit of a girl thought they would make a good nose piercing), but he slept well under the flyover, freezing cold on the outside, but snug within in the warm satisfaction of the knowledge that he had changed the course of cultural history forever. The very next day Henry formed 'Earth Crisis' and invented Hardcore Punk.
..And how do I know? I was in the pit and got smashed up massively. It was sick."