An employee was assisting with assembling a trench box. A forklift was used to carry a 150-lb. steel spreader tube which was to be placed between the trench box sheets. The forklift tipped forward, causing the spreader tube to roll off the forks. The tube struck the ground and pivoted in a "baseball bat swing" movement, striking the employee on the left side of his torso below the armpit and also on the outside of his lower left leg. The employee sustained a broken rib, internal bleeding, bruising, and contusions.