So one day i was running towards the gates of IF to duel i was on my mount and then suddenly i hit a sharp edge and fall through the world thinking it was normal i spirit rezzed only to fall through the ground again!!! so i ticket the gm and they don't know whats wrong either as of today i reinstalled wow and still have the same problem so i have to reboot my computer. i made a little video.
http://youtube.com/watch?v=4aDbpgrkTxQ