One time during soccer practice, my friends and I were just talking during one of the drills and a flock of crows flew by. One of my friends pointed them out, saying, "That's a lot of crows." I, being the sarcastic b*tch that I am, said, "Really? I thought those were penguins."
She thought I was being serious and started looking at me like I'm a dumb*ss. After seeing her reaction, I made it clear that I know penguins don't fly, and now make fun of her because of it.