I was playing a straight pool match about 3 years ago on a 9 foot table with shimmed pockets, and a situation came up whereas I needed to shoot a masse shot, but getting positioned for the shot was difficult. So, I somehow got the cue behind my back. The butt/grip hand was near my neck/shoulder, but behind my back. I actually made the shot. My opponent thought it was pretty crazy, and if I tried it today, I'd probably pull a muscle and cry like a baby
I can't remember the details of why I needed to shoot it that way. I think the cue ball was near the center of the table, and that made it hard to get positioned for the shot. I used both hands, but it was an air bridge because there were balls around the CB. That's probably why I didn't just shoot it left handed. I remember trying to get positioned right handed and left handed, and it just wasn't working out. I also remember trying to use a european masse grip, and my arm got locked up and it felt really awkward. So, I used my normal american masse grip.
Anyways, maybe a behind the back masse shot might be worthy of trick shot status.
I think the coolest trick shot I've seen was by Yoshikazu Kimura when he shot a jump shot and the cue ball curved in the air.
