If you had been at PT today, you would've heard SPC Egregious not only explain what the fuck he was talking about, but demonstrate the noise as well.
(It's more like an elephant, really, but he says that's what a rhino sounds like in his head. And, since he used the phrase "noise like a rhino" to describe the noise a particular someone made when a particular event happened to them, that's the noise he produced for the recipients of that story. It isn't actually the noise that the particular someone made, but it's the noise many of us now associate with that act (I think).)
edit: Fuck it, Geeze gets an insightful, too. (He'd get more if he blogged.)