I've just seen the pic of the loading of a military vehicle.
Fear of Landing ? NTSB Open Docket of Bagram Cargo Crash Documents
When we deliver agricultural tractors on trucks in the UK, the tyres are pumped up hard, real hard, to stop the tractor bouncing loosely around on the bed of the truck.
The tyres on the m.v. seem to be very underinflated, and it's likely that on a bumpy take off this may cause snatch loading of the chains and straps by allowing the vehicle to move in all axes.