I have recently been wondering the same thing. You should try and leave a branch with some foliage as an energy source for the root mass, but do please let us know! Im sure my curiosity will get the better of me and ill try it a few times till it works. It would be fun to see how fast the root mass would grow the clone or if you flowered right away would it produce super bud being a HUGE root to plant ratio...all so interesting.