FIRE: opinions on what happened
 

anyone care to speculate about the origins of this fire ?

did he blow a tire on the drivers side rear axle ?
or over heat the brakes ?

Copart

Fire cause
 

I would think the truck was not moving when it burned. My guess is some equipment fire inside on the passenger side above the tires. It would help to have more clues.

if you look at the passenger side, it looks like the fire started in front of the drive axles....and by the patter of the smoke (tapered at an angle) i think the truck must have been moving.

if the truck had been stopped the smoke & burn would have been straight up.