if you start the Emperor fight before the trash next to him is dead, the players get flung into the center. when they run out to try and kill trash, they get thrown into the center again... just constantly repeats until wipe.
posted in noarmal exploits because i'm half-heartedly hoping for a fix.. considering this just happened to me (i wasn't the troll)
works in LFR, i assume it works if u want to troll your main's raid though.