EE was standing on bed of welding truck w/ 3 screens in front of him, leaning on welder. He pushed 1st screen onto EE's forks & screen caught his glove, pulling him off truck. He then fell to the ground and during the fall, the sharp edges of screen cut his arm, chin & neck. The arm injury was severe, with his skin being peeled back exposing muscle, veins and possibly tendons.