This is the second time I've made a comment in defense of the police in a specific incident and if it's anything like last time I will be downvoted to oblivion.
Do you have any information to support your claim? (another video perhaps?) I think false claims only hurt those in support of police reform. I'm not suggesting that's your intent.
From the video in the parent post I don't understand how you reached your conclusion as I see something completely different. I see Adam attempting to enter one vehicle at 0:11 that drives off. Then he makes his second attempt with a different vehicle at 0:16 and clearly jumps into the window of an SUV. Stepping forward frame-by-frame it appears that the officer is pulling Adam's shirt[1] which would be the opposite of pushing him in. This is obviously just my opinion from that single video.