My friend has managed to get his warrior/sp combo to 2200 using this trick.
Heres how to do it:
1. Shadowpriest Mind Controls an enemy player on a bridge (any bridge works, so long as it is fairly high).
2. Shadowpriest runs them to the edge of the bridge, then jumps off.
3. Shadowpriest dispels the mind control buff. Best if using a /cancelaura then /announce type macro, so the warrior knows exactly when to do:
4. The warrior charges the target in midair, the moment after the MC effect fades.
The target will then disconnect. This can be done in lordaeron arena as well, just it is significantly harder. A good practice spot is the bridge to ally aid station in AV. While this will occasionally fail in BEM, I have never seen the target not DC in AV.