What's the best and/or funniest insult you've ever heard a fictional character say to another character?

For me, I don't remember what specific movie or TV show, but the interaction went something like this: this was a fictional fantasy world where many different species existed, one of the characters was a human and the other was a demon, both male if it matters, and both of them were making small talk, and the human noticed the demon had gigantic wings, and so the conversation went something like:

Human: These are some pretty big wings ya got there huh?

Demon: Yup... so I've been told.

Human: Can you actually fly with those wings?

Demon: WHAT DO YOU THINK MAN, THAT THESE ARE JUST FOR DECORATION? Shit, sometimes I even wish I could get rid of these things because it gives my opponents something extra to grab!

And to me it was just hilarious because the human asked this really stupid question with legitimate non-ironic curiosity; and then the demon completely shut him down without even insulting him directly, just simply pointing out the obvious. LOL!

What's the best and/or funniest insult you've ever heard a fictional character say to another character?
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