Exactly. The other two cops obviously were done with him and moved to give him room. I looked at the guys left hand on the control kinda blurry but he was trying to correct the chairs direction because it had been pointed toward the curb. His last move before it hit the shoe was toward the street or to his left. Curbs are a serious danger to motorized wheelchairs and users fear them for good reason. He needed more room on the officer to his right side and it appears he was trying to stay as far up hill as possible and still miss him. His body position told him one thing but cops foot stuck out in front way beyond where he was standing by what looks like about 18 inches. I would have moved my darn foot in toward the wall badge or no badge once I heard the relays click. The push at him came way to fast also. This stinks. Verbal abuse or no that is no reason to push a man like that. It would have taken substantial effort to have tipped that chair over the man using it could not have done it.
The media doesn't know the difference and often confuses the two. I'd bet he's an incomplete quad. That is the term used when the person has some useable movement like the ability to use a motorized wheelchair but not enough strength to wheel themselves.
I think the cop needs an education. He needs to spend some volunteer time in a spinal cord/head injury rehab center.