It's kind of a "breakfast do-over" at McDonalds.
First, they're only going to sell you the part of the muffin you want... the top. Yup. The idea that originated during a Seinfeld episode from 1997. Muffin tops are coming. They thought it was a great idea, because people do that in the break room at work. When no one is looking, the rip the top off and leave that paper covered stump for losers to eat.
Here's proof they thought of it first on tv.