It's my belief that when you miscue and cause the cueball to jump into the air, that you just committed a foul by scooping the ball, which is an illegal jump-shot. I know it may have been an honest mistake, but I can see some people trying to get away with a cheap safety by doing this. I was watching Steve Morre playing Dennis Hatch on propoolvideo.com and Steve accidentally miscued on the 7-ball in the 19th game. I think Dennins should have had ball-in-hand, but it didn't matter as he had an easy shot to get out. Let me know what you think.