What happens when you call Daniel Cormier the wrong name?
HE PUNISHES YOU WITH A PIE TO THE FACE!!!
That's what happened to this TMZ staffer when he accidentally (stupidly) referred to D.C. as "Jon" during a recent segment on the "TMZ Sports" TV show.
Friday was his day of reckoning ... delivered by Cormier's right hand.
Make sure to watch the whole thing on "TMZ Sports" (airs tonight on FS1).