Warning: This May Give You a Stroke

I hate to brag, but I believe I'm a better Pong player than average. It's not such a hard game, at least at slow speeds; it requires the ability to anticipate a reflection vector, which isn't so hard, or so I thought until I took a crack at this massively multiplayer online pong game. And, ahem, you have been warned by the subject line.

(HT: Crooked Timber)