Simone Biles and U.S. gymnasts post gravity-defying mannequin challenge

Yes, the Cleveland Cavaliers had the First Lady, Portugal had Cristiano Ronaldo in his underwear and the Atlanta Hawks had actual mannequins. But when you have a bunch of Olympic gold medal-winning gymnasts doing the mannequin challenge, it's going to go straight to the top of the heap.

Gymnasts including Biles, Nastia Liukin and Danell Leyva all took part as they practice for the Kellogg's Tour of Champions. Those poses are hard enough to get into for a millisecond, so imagine holding them like a mannequin. I just pulled a muscle thinking about it.