The TV clip from Boise had clear view of the side of the pickup. Looked, like a 3/4 ton crew cab with a tall lift kit and big tires. That plus high freeway speeds and a bump can start a violent trailer sway.
I was gonna say it looks like there are no wheels or tires, but I brightened my screen and saw the whole rear axle is out on the drivers side stretching from the wheel well towards the bridge railing..
I wonder what is holding that?