He'd love to pose for the camera but now he is holding the police helmet he is worrying that the next copper along would assume he was taking the piss and clobber him. It's a complex mask of conflicting impulses.
As an American I don't understand what's happening here. They are clearly some kind of police force but I don't see any military hardware, there's no blood, there's no guns anywhere, and the people near the police are still not beaten up and arrested.
Those must be the most stoic brave superheros that manage to survive despite all the danger!
Many states in the US have laws that you cannot get that close to police without being arrested yourself. Louisiana's passed just last week. Arizona tried to ban filming them a year or two ago. Just thought the dude with the US flag jacket should know!
Clarifying: the Louisiana law is literally you must stay 25 feet away when told and says nothing about recording. The (old) Supreme Court told Arizona that it's against the Constitution to have laws against filming.
The wink wink of it is likely so people can't easily film, but it isn't what the law says
We've got loads of culture, it's just that the rest of the world has appropriated it and no longer recognises it as ours.
E.g. the suit. George Bryan "Beau" Brummell is responsible for that (he died 'shabby and insane' in France, perfectly British). It could easily have gone a different way and we'd all be wearing lederhosen to work, weddings, and funerals, but there you go.