A driver backed his waste truck up to a dumpster. Another employee got out of the truck and went to the rear of the loader to hook cables to the dumpster. The driver had the truck in neutral with the parking brake set. He accelerated the motor to pick up the dumpster and when doing so the truck rolled backwards and pinned the employee between a wall and the dumpster. The employee was hospitalized with a hairline fracture in his hip and internal injuries.