Bonus points if you install an automatic fire extinguisher in the engine compartment of your car.
These can run $250, but have value in accidents and fire-bombings (molotov cocktail tossed as you drive near/thru a crowd).
At least buy a manual handheld extinguisher for $12 or so for inside your cockpit (ya cheapos!).
#12: anti-laser goggles. I carry these in my cars+aircraft, but you might consider carrying 1 red and 1 blue anti-laser goggles if you are going to a large crowd event such as in a stadium.
Battlefield anti-personnel lasers are showing up in the Middle-East. This isn’t Star Wars...the lasers are designed to blind you (if you have no protective eye cover).
At some point, terrorists will attempt to blind a crowd just before they engage in a stampede attempt. Creates maximum panic.
If you don’t have the goggles during a laser blinding attack, jury rig a pirate-style patch over 1 eye so that they can’t fully blind you in a single hit.