hmm... treid different actions in reverse grip... and they all seem to end up with hitting the blade end to my arm. Seems a very illogical and HIGHT dangerous way of handling a light saber to me.
It is a labor intensive method of fighting... Lots of strength training, and lots of training for being in close quarters with your enemy... It's every bit as dangerous as using a double bladed lightsaber, with the added stress of limited reach.
That being said, it's pretty difficult to defend against when someone utilizes it well.