What had the police done to Pusey that night? Nothing. Just traffic offences. So what could possibly justify his negative attitude towards them when they were lying there dying? Any normal person would have tried to render assistance to somebody they knew was dying.His actions are no where near that of driving your truck into 4 innocent police officers without breaking, killing them in agonising ways.
Frankly I also think its quite hard to judge how any reasonable person would respond to come back from a toilet break in the bushes and see 4 police torn into pieces and breathing their last painful breathes right before your eyes. Its an extraordinary event.
Clearly he didnt respond in a good way - but what would you do?
First aid - no point these people were beyond help.
Leg it - can imagine just wanting to run as far from that horror as you can
My point is - any average person who thinks they can predict how they would act in that terrible situation is lying.