Good try Malcolm,
It does flick back from loose sand and even more so because it is loose when a ball is struck.
On the empty tee flicking back; If the club touches the forward edge of the tee it will flick back but this is not quite what happens when the ball is struck.
It does have everything to do with the ball however. Like I wrote earlier. Answer tomorrow. It is the answer that Dr Karl agreed with. I wonder if Mythbusters would be interested?
Steffen
You're holding your mouth wrong.
Cheers