It happened to me. It was so weird. I joined a match already in progress and everything was in slow motion. The announcers voice was all low and in slow motion. I know your gonna say that it was lag. I have been in plenty of matches where the hosts connection sucked and the match was laggy as hell but this was different. Nobody was "teleporting" around the map, and when you aimed and shot at someone they actually died. Movement, reloading, shooting everything was in slow motion and from what I could tell it was the same way for all players. Wierdest match ever, and it was awesome.

The same happened to me but opposite, i was playing sabotage the other day and everything was double the speed. The announcers voice was really high pitched and quick. it was like having double tap on constantly and having your sensitivity at 10. great fun though.

It was a guy who had been messing around with mods in private games with friends and then apparently the mods made there way into public games and is passed on to other people in a way that I can't be bothered to explain, but it's been fixed already. http://twitter.com/fourzerotwo