Michael Jordan didn't hold back when he faced O.J. Mayo during a basketball camp back in 2006. Apparently Mayo, then a senior in high school, engaged His Airness with a bit of trash talk. Jordan, at 42, was officially retired (for real this time), but the greatest player of all time wasn't about to take lip from a young stud.

Jordan cleared the fans from the University of California-Santa Barbara gym and declared school was in session. What you see in the video below is a textbook example of shutting up a trash-talking opponent. The talented but raw Mayo, now with the Milwaukee Bucks, has no answer for Jordan, who finishes the clinic by backing down the high schooler and draining a perfect turn-around, fade-away jumper.

Respect your elders. Mayo learned this lesson the hard way.