Okay, let's be more honest and call it a waste of time.
But when GrymReaper suggested that it would be fun to have an in-game pongHUD, I just had to give it a try. This is the result: Ping version 1.0! Yeah, it's Breakout, not Pong, but hey I think it's more fun.
By default it uses ALT-P and the keypad keys Up, Down, and Insert (start game). You can change these in the code - make sure to read the file before running it!