I had something fairly similar happen to me once. I was making a drive toward the basket full-steam with the ball and got T-Boned by a player on the opposing team hard enough that my body left the chair and my shoes stayed strapped in. This was a few years ago in a tournament in Orlando, back when I played.
The technical foul would've been against the guy who jumped out of his chair. It's an automatic technical to do that in a game of wheelchair basketball.
