Youtube Police

I wonder what the officer's PCA said. I mean, the man/alleged perp., regardless of color/race, was on a pedestrian sidewalk; is such behavior a crime? I'm not defending either person, but I feel the confrontation was uncalled for and, at least, could have been avoided by the officer remaining calm and calling for backup. Imagine, yourself, walking down the street and having the police officer...

1st, start yelling at you.
2nd, demand you come off of the safety of sidewalk onto a busy and potentially dangerous road.
3rd, get down on that busy road - - - face down.
and 4th, worse off all, while he aggressively points his gun towards you

How would one feel?