because "rebounding" sounds better than "ladies jumping on trampolines"

I just did a rebounding class at the gym. The instructor was this cute little guy, queer as any rebounding instructor should be, who, while we were running in place on our trampolines, ran into the aisles between us and just started dancing all early-Micheal-Jackson style, while women cheered and whistled.

Among the music for this bouncy little party was a song that primarily consisted of the phrase "her ass is a spaceship that I want to ride," which I found a bit disconcerting. It reminded me of working out at the gym at Dartmouth to endless repetitions of "Smack My Bitch Up."