My mother-in-law did not fair too well with her car on a mechanic's rack either.
The car was up on the rack and they were removing the gas tank as it had a leak. They were using a hanging light bulb to see, when a drop of gas dripped on the bulb causing it to ignite the gas tank.
The fire consumed my mother-in-laws car as well as the entire repair shop. One of Burbank's biggest structure fires in quite awhile. The smoke could be seen for miles. Nobody was injured.
Unlike your truck, there was no question as to whether the car was totalled or not.
