Those with eyes (and no dog in this fight) can watch the cop advance towards the cyclist and shove him off his bike.
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That is what I saw also. And I dislike neither the cops nor the civilly disobedient. But ... check out the storm drain at nearly the exact spot where the cop exploded into the biker. Could he have tried to miss that and come too close for comfort to the cop who then reacted (albeit with an apparently unnecessary forearm shiver).
Yes, but it doesn’t look like a storm drain to me. There is no grating in it, as you’d expect to see in a storm drain, which could cause a cyclist to crash. No, it looks like a solid, metal utility access door of some kind to me. A little rough to roll over on a bike, granted, but not a reason to choose instead to ram a cop.