If you mine a rock and you are positioned on top of it, mine it till it's gone and instantly levitate. Cool for shock value if your friends don't see you mine it.
Also in the Valley of Honor temple where you qeue for BGs, if you jump up on the table next to the AB battlemaster, then jump you should be able to suspend yourself halfway through the curtain. Just another "shock value" trick. Try dancing with your midsection cut off by the curtain, or laying down which makes you look like your floating.
Hehe, sucky tricks I know but they entertained me for a bit.