>>2419658Look closely at his pants, the cloth coming down to his knee is flat up against his leg, but below the knee it's going in the opposite direction. This is an illusion that occurs when you wear loose pants and there's some wind. I'm pretty sure someone exaggerated the effect in OP's pic, but if you catch the right moment, it does kinda look like the leg is bending back. Reporters use cameras that fire off so fast it's like capture video, so finding the perfect level of bendage to laugh over is trivial. You can find all sorts of funny things that people seem to be doing when frozen in time.
