* AlternativeCharacterInterpretation: Some would say Mark is an asexual.
* MemeticBadass: Mark, thanks to ''Blog/TheComicsCurmudgeon''. You'd think his punching prowess was equal to that of [[VideoGame/{{F-Zero}} Captain Falcon.]]
* {{Narm}}
* NightmareFuel: Nearly every time that Jack Elrod drew Rusty was so rife with UncannyValley that he looked like some kind of monstrous goblin with black eyes. In fact, one of the first major clues that James Allen was starting to assist with the strip's artwork (before formally succeeding Elrod) was that Rusty suddenly started looking fairly normal.
* PurityStu: Mark.
* WarpedAesop:
** Sometimes the GreenAesop will be this, when animals' lives are treated as unconditionally superior to human lives.
** See also: BabiesMakeEverythingBetter.