An employee was working on a bonnet channel. The employee used a plasma cutter to cut the round seam where the head and channel meet. He then hooked a crane to the lifting lug on the head and cut the pass plate from the head. The head of the channel came loose and was caught by the lifting lug. However, the pass plate fell on the employee's legs. The employee's legs were crushed below the shin and there were fractures to both legs.