Congratulate me, step right up, shake my hand

We played something like that in San Francisco, though we just called it handball. It was the same thing they're saying where the ball must bounce once (and only once), and some of the terminology was the same as what they have listed in the Wallball article. But we always played it with a big rubber playground ball (the kind used for foursquare). Using a tiny little raquetball sounds hard!