Abstract: At approximately 8:00 p.m. on March 23, 1992, Employee #1 was preparing to spot a trailer. He backed a tug under the trailer, then hooked up to the fifth wheel. Employee #1 then got out of the tug, leaving it in reverse and without setting the parking brake, to attach air lines to the trailer. When Employee #1 attached the air lines to the trailer, the trailer's brakes released and both vehicles started to roll backward at an angle because the tug wheels were not straight. To stop the vehicle, Employee #1 tried to re-enter the tug's cab but was caught between the tug door and the trailer next to the tug. He was crushed to death. Employee #1 did not follow the company's written policy on setting parking brakes and taking vehicles out of gear when unattended.