Ya it was hard to tell with the angle the photograph was at, and having never played the game. It looked like the angles might work out so that the ball would not sit on anything up there with the two rings, but I'll take your word for it that it can get hung up.
On another note, the rubber ring below the one in question doesn't look like it is very tight. Could be just my eyes though. In my opinion in most cases you should use the smallest ring you can reasonably stretch over the distance to get the most bounce and avoid the ring absorbing too much energy. Tighter is always better in my opinion... :shock:
That's just my two cents though.