Ah, tone trolling. The lowest form internet debate. What better way to avoid engaging with the substance of someone's argument, than to take issue with how they've presented it?
Comic books, then, since you brought those up. Demonstrate that a centaur climbing a ladder is "comic book believable."
(I don't concede that D&D is required to be "action movie believable" or "comic book believable," by the way. I don't personally consider either of those to be much better than "Loony Tunes believable." I'm just lowering the bar for you, since not every group is going have the same standards regarding genre and tone when it comes to matters of verisimilitude.)