Sorry to add a touch of fairness, but the bloke doesn't "casually throw a looped chain over the towball"; the chain is already attached to the tow hitch the first time it's shown strung out, and it's distant enough to be unclear how it's attached.
I know underestimating public intelligence is the only safe option, but really, if we were to be requiring tv programming to show only what we should be doing, Top Gear would never have got off the ground; and that's been reasonably popular.