This can't be the hardest thing to do. Put the protruding end through the holes in the cart, and maybe put a few things around it to prop it up. That's why this is so ingenious if indeed it is a thing. You have to deliberately do that. And only people who understands the meaning will even notice or pay much attention.Never tried it. Not sure how you get a pineapple to stay upside down in a grocery cart anyway