There was a really good video clip of a protestor in 2020, paraphrased: "we came out to protest, then the cops started hitting our heads with batons. we started wearing helmets, so they gassed us. We started bringing masks, so they attack us. Now we bring shields and they call them weapons. Someone is escalating this, but it's not us".
Basically, any evidence that you plan to defend yourself gives the cops, in their mind, cause to attack. Since you planned to defend yourself. Except fire. Cops are scared as fuck of fire.
At around 13, with no experience outside knowing how to ride a bike, attempted a 6 foot BMX bike jump, the kind with a near-verticle lip. After two bailed attempts, I committed to MORE SPEED on the third try. I went straight up, couldn't position the bike forward, and fell directly backward onto my unhelmeted head and back onto packed dirt and gravel. Always kind of felt dumber, slower after that day