EE saw co-worker at Screen 15 with the hood opened 3/4 of the way. The hood was blocked by screens stacked in front of it. In an attempt to lay the hood flat, EE crouched under the hood to lift/push screens out of the way and ee felt pain in lower back thereafter. Pain did not go away, EE out on injury from 3/15/17 and sought medical attention on 3/17/17.