It can be done Tom but you sure are screwed, or should I say, "screwed up", if the darn thing kicks back at ya.
I have never seen it done in the seat sitting position Brewski. That is a pretty good feat. It sounds like a good way to punch yourself out if all doesn't go well.
My buddies all do it kneeling facing the rear. Most of them do it to show off but a few do it because they have to. None of them have broken an arm or thrown a shoulder out of place yet. YET !!!