Over-exertion in lifting objects
EE WAS USING A ROTARY JACKHAMMER TO DRILL HOES IN A ROCK WHEN HE LIFTED THE HAMMER UP OUT OF ONE OF THE HOLES, HE HURT HIS BACK.
EE WAS USING A ROTARY JACKHAMMER TO DRILL HOES IN A ROCK WHEN HE LIFTED THE HAMMER UP OUT OF ONE OF THE HOLES, HE HURT HIS BACK.