The teenager's dad had thought Charlie's towing rates too high so arranged for the kid to haul the trailer along with Charlie towing another. The kid left Charlie in the dust on I-10 going west, and a while later Charlie noted an object in the road ahead - a glider wing! He stopped and got it off the road. A few miles further another wing. Eventually, he found the kid at a rest stop unaware that the back door of the trailer was open.

You get what you pay for!