A guy on the pair next to us leaves the 4-6-7-10. He throws the ball really hard - especially when he's not happy. He wings that baby down the lane at around 30 MPH - picks off the 10, which bounces out of the pit, and gets the 7. The 4 and 6 were standing there as pretty as you please!
I've heard of this happening, but I've never actually seen it.