Struck against a moving object
Employee filled the water truck up and started back across the street to the hopper to blow it out, EE heard a noise sounding like a tire blew out and the truck started to tilt over to the right and then flipped 3 times, EE passed out for a minute and when EE came to, EE took EE's seat belt off and looked around to see if EE could tell anything leaking EE climb out