Dave comes through again
Thanks for that clip, that's exactly what I was looking for.
To me, it's pretty clear that the shaft grazes the ball as it rises (barely) in that video. But without the benefit of the video I'd probably call it a good hit. It's true the stick bends out of the way of the ball, but then when it bends back into place it seems to be tapping it gently.
I guess the bend factor makes it even more difficult to judge the double hit.
I'm almost inclined to say screw it.. if a player can jump 80 degrees and make the intended ball, he deserves it. On the other hand I might change my tune if it's clear this will be a double hit (like an 89 degree jump) and he's on a gamewinning hanger for cash.