So I take it you are unfamiliar with how a car seat works? Or even what it is. It is a seat you put on the passenger seat or back seats that is strapped in for a small child to sit in. The father is drifting on what appears to be a course set up like a pro drift course in a big lot so the only thing they are going to crash into is maybe one of the foam dividers. Also he is drifting on what appears to be a tight course so they aren't going very fast that wrecking would be a concern. The knot is tied into one section of the harness so yes it would hold if he were to "wreck" into one of the aforementioned foam dividers while not going very fast. So yea the only point you were even remotely correct on was the shoulders being a little to loose. But again drifting in a big parking lot with nothing but foam to hit.