A product case had fallen into the T-car path of a palletizer, causing the T-car to stop. After lockout, an employee entered through an interlocked gate to remove the case. The employee was stepping past the T-Car when he stepped onto the rail of the T-car on the empty pallet slide. He slipped and fell backward, suffering a laceration to the back of the upper left leg (from the T-car slide rail) and a puncture wound to the back of the upper right leg (from the edge of a cable track pan).