Wow, what are the chances a guy and a camera person can sneak up on an unsuspecting person on a mobile in a deserted back alley with no footprints squatting down with a loop in the back of his trousers, tie a chain or rope around a post and then hook the guys trousers to it, all without being seen? He then runs and his trousers come down, rather than his trousers staying in place and his waist gets crushed? Sounds legit to me.