I searched, didn't find anything, my apologies if it's posted elsewhere.
If you're a warlock, you can simply cast Metamorphosis and Demon Leap, for the other classes, you need a shaman or a druid to cast their knockbacks on you at the same location while dueling. It's harder to pull off, but possible.
Start Here:
Cast Metamorphosis and Demon Leap.
End Up Here:
It probably works in other places, so post any you find.
This will become more useful once flying is in.