Buttered Cat Paradox
The buttered cat paradox is a common joke based on the tongue-in-cheek combination of two adages:
• Cats always land on their feet.
• Buttered toast always lands buttered side down.
The paradox arises when one considers what would happen if one attached a piece of buttered toast (butter side up) to the back of a cat, then dropped the cat from a large height. Some people jokingly maintain that the experiment will produce an anti-gravity effect. The faux paradox has captured the imagination of science-oriented humorists.
The idea appeared on the British panel game QI, where the idea was discussed. As well as talking about the idea, they also brought up other questions regarding the paradox. These included "Would it still work if you used margarine?", "Would it still work if you used I Can't Believe It's Not Butter?", and "What if the toast was covered in something that was not butter, but the cat thought it was butter?", the idea being that it would act like a placebo. The paradox also appeared in the episode "Gravitational Anarchy" of the scientific podcast RadioLab.
Brazilian energy drink brand Flying Horse has released a commercial that simulates the recreation of this phenomenon, which is then used to create perpetual energy. I used the commercial to make the gif. below.