The limit of the Willing Suspension of Disbelief for a given element is directly proportional to its funniness.
Any violation of continuity, logic, physics, or common sense is permissible if the result gets enough of a laugh.
This is the comedy equivalent of the Rule of Cool, and is accordingly weighted more in comedy shows. Especially easy to invoke in humor-based American animation and Webcomics, where people expect the lack of realism in the art to translate to other areas.
Rule of Funny is not a superpower. One of the characteristics of the rule of funny is that it can give some abilities to a character to the sole purpose of a gag, which means the character just CAN'T do that when it's not funny. For instance, Wile E. Coyote frequently walks on thin air because he hasn't noticed that he's at the edge of a cliff, and he falls when he notices it. It is Rule of Funny: Wile E. can't walk on thin air as a previewed part of a scheme.
Compare Rule of Fun.
