One August we were traveling up the grapevine in So. Cal and we saw a motor home fully engulfed in flames. The size of the flames and the smoke were amazing. Several passers-by had stopped to help so we kept going. It looked as though the people had just unhooked their car from the rear of the motor home. The fire engines had not yet arrived. We had friends about 30-45 minutes behind us. They said that when they went by it was just a steel frame. It burned very hot and fast! We felt bad for the people involved - their vacation and personal items ruined.