Cool, I didn't know that. Good to know; explains a lot of my problems with bunker shots (have a lot of forward lean in my game). I wonder if this is why Butch and Tiger say that the bunker shot is all right hand?
For a good player with lots of forward shaft lean, it might be very helpful to think of a bunker shot as 'a well-timed scoop'.
But I also see a LOT of higher-handicap players who are trying to flip out of the bunker. Brian demonstrates it as trying to eat the ice-cream cone in Over and Out. And long ago when I was taught a very strong grip, ball back in my stance short game, I was also taught to flip from the bunker. But when I switched to a more traditional setup this led to all sorts of problems.
So, for me at least, it's still important to make sure that I lead a bit with the handle in the bunker; otherwise I just flip it in the ugliest way you can imagine and either blade it out or leave it in.