EE STATED HE WAS GIRNDING A WEAR LINER IN A WASH BOX WHILE SEVERAL OTHERS WERE INSTALLING FLIGHTS IN THE WASH BOX. THE FLIGHT THEY WERE INSTALLING CAME OFF THE BOLTS CAUSING IT TO SWING AROUND. THE SWINGING MOTION CAUSED IT TO PULL OUT OF THE HOLDER ON THE OPPOSITE END AND FALL. THE SWINGING MOTION THREW THE FLIGHT OUT 4-5 FT AND IT STRUCK HIM ACROSS THE TOP OF THE HEAD