Agent West tends to generate these whenever he appears.
In episode 6, Zeta is at a hotel messing with Ro's hair via holograms while she decides how she likes each one (She hates all of them). When Zeta questions the point of the game, Ro tells him it's just for fun, that he has to stop and smell the roses once in a while. After Zeta fails to understand this expression, Ro explains she's talking about relaxing, he holograms his normal appearance with blue clown hair, looks in the mirror with a completely straight face, and says in his normal neutral way: "I still don't get it."
The entire existence of the pro free space travel hippies is this, but a few gems include:
Space hippie: (To Zeta) Personally, I think you're an alien.