You certainly can improve your guess. If you're doing a "pull cut" while turning outside a bowl, even though you may only have your knuckles inside the throw zone, you are exerting force toward yourself with the movement of the tool and the shape of the object. If you pull a loose piece, it has a vector toward you. It is not a free release object that tries to go in a straight line out from the arc, but to nit-pick Bill a bit, is affected as well by the tug of gravity to fall in a ballistic curve. If, on the other hand, you are pushing away, any piece you knock loose will have a vector away from you. That's a good thing. You get the benefit of a clean face, too, because what you're releasing as shavings are directed out and away. I think this is where people get into trouble. They have a blank with a rough surface which might be hiding any number of faults, and they read somewhere that they should turn the rpm of their electronic marvel up until it shudders before backing off a few turns. Then they try that pull cut they saw on the DVD. Excess energy and the wrong presentation. Inside, the biggest danger is the "catch", which is really a push up and perhaps some out. Once again, the piece will try to move opposite the applied force. Break a tenon and things can happen. I like to improve my chances by holding the entire piece between centers. I also prefer to cut at low rpm, so there is barely enough energy to release the shaving, not enough to throw the piece.