going to need some new garage door panels.
There is only one way to haul those cheap formed metal panels in a vehicle like that. They have to be bundled together and wrapped, shrink wrap will do a good enough job of stiffening the bundle if enough is used, then for obvious reasons if they are going to be hauled in a short UTE or pickup, a strap or rope or anything stronger than a man's grip tying to the headache rack is better and safer than a man trying to hold them in place. The guy was lucky he wasn't thrown out of the back of the pickup as well.
The more I see this kind of stuff the more I am reminded of how lots of folks have tried to haul mattress on top of their cars by having 4 people inside the car grip on to the handles it usually does not end well.