Originally Posted by
Ciddy
Unfortunately, there's not much you can do. Unless the douchebag is using some kind of exploit or cheating, GMs are going to put it under the "PvP happened, deal with it or pay to move to a PvE server" umbrella most of the time. Not saying I agree with it, but that's generally what they do.
You can try putting in a ticket if you haven't already done so, but I doubt that's going to do much. The only option I can think of is getting friends to come out, watch your back, and try the same thing to him (assuming they play classes with the capability to do much damage during a slowfall). You could also try putting a bounty on his head if you have a lot of gold, but I can't say if you'll have much luck trying that.