Stop in for a cup of coffee

Quick question. The semi truck on the freeway with rioters.....I am sorry but if I was driving that truck and accidentally ended up on that road the people started climbing on the truck. There would be no stopping..Truck may not supposed to be there, but climbing on the truck and forcing the driver out....nope. Is that wrong to think that?
Same situation with a video of 2 cop cars. It was reported that they were "plowing through the crowd". It looked to me like the protesters were surrounding the cars and started climbing on the car. What were the cops supposed to do.