1300 hp mercury comet brake failure crash

I kind of felt the same. I am no automatic expert but,can someone explain why the car would still be pulling in park? shouldn't the valve body have disconnected the trans?
I think "it depends" is the answer. Hard to tell from the video if the street is level. It might have a downhill angle going to the light. Plus, did he "leave" it in park all the way to the crash? I thought I saw him pull it out and put it back a time or two, so he may have added insult to injury there. All of "THAT", plus, it could have had some kind of transmission failure as well. If the brakes failed and the throttle was sticking, what else was wrong?