13. I'm more concerned with the fact that you can't see a spiked volleyball on HDTV.
Whenever there is a spike or a hard serve, the HD compression causes the ball the literally disappear until it reaches its target. I did some freeze frames and sure enough the ball isn't being rendered, other than at the start and end points.
This wasn't a problem on old analog TV's because the ball would blur and you could interpret the motion.
When the ball disappears while in play, sports stop being fun to watch.