In hindsight, I think the only way he could have survived would have been to not move at all. The trigger-happy lunatic was going to shoot him the instant he made any "unexpected" motion, which was inevitable given the confusing and contradictory orders being shouted at him.

I can't bring myself to watch it either, but from other descriptions: the police order the man to crawl towards them (while simultaneously yelling at him to put his hands in the air). As he's crawling along the floor, his pants start sliding off. When he reaches down to pull up his pants, the police kill him.

There's not a lot you can do.