IW was stndng on the lft side of the trlr. The drvr chked the side mirror, he saw IW begin to walk away from the trlr. The drvr then noticed a pu truck approaching on the rt side. The drvr looked to see that the pu was not pulng in front of him. He then began to pull fwd. While pulng fwd he rechckd his mirrors and saw IW falling to the grnd. The drvr stopped the truck.