The show Barnyard Animals was my first thought when I saw this prompt. Those animals are always trying to do things animals by our knowledge would never be capable of doing.
I guess the concept of how we use the phrase "when pigs fly is new for me", I can't actually remember a time when I ever said it. But, then again I believe in never saying never.
Life always has a way of sneaking up on you when you say "this or that" will never happen.
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