Teargas grenades are usually hot. Don’t grab them with bare hands.
If cops are shooting at you with what looks like a regular gun, GTFO of there. Rubber bullets can kill you.
If a crazy redneck shoots up your protest, apply direct pressure to bullet wounds. Apply tourniquets “high and tight” to uncontrollable bleeding on extremities. Set up a casualty collection point where an ambulance can get to it, and drag wounded there. Dead people are dead, save the alive wounded.