[He doesn't hear the aside, which is for the best in this situation for a lot of reasons. He hears jet-ski, and that is way, way more interesting than Komaeda's unfortunate choices.]

Nope! Never been on one, huh? Neither have I . . . but I've worked on 'em before! This's my first underwater one, though. Anyway, either way they're totally self-propelled. Imagine a motorcycle you can ride on the water! Totally sweet, right? These're a modified design that you use underwater instead!

. . . By "you" I mean Rapplejack! For now.