Joe Pickett and Nick Prueher of the Found Footage Festival are not strongmen, but they play two of them on TV. They took on the duo name Chop & Steele and convinced various local TV morning shows to feature them. Their strongman act is obviously lame, but it's probably the best they could do. See a compilation of those attempts at Found Footage Festival.
The newscasters were no doubt rolling their eyes when the camera wasn't on them, but they had to put on a brave face and act like nothing was wrong. Esquire interviewed Pickett and Prueher about the stunt and found out it was ridiculously easy to pull off. After all, they had done this same stunt a few years before. -via Tastefully Offensive