I rather think it may have happened when getting off a lift. Think a Nugget zinged me with a ski causing me to fall. I fell on the ramp, landing, somehow, on the back binding (closed) and rode the board down the ramp while laying on my side, on top of the binding. Funny as hell and I did get one of those "Daddy, what are you doing?" questions from The Girl. Anyway, I think that is when it happened. We'll see what happens.