[Mana]

old french fries under the seat to maintain a localized biome in my car

serious answer: everyone should have a dashcam to protect yourself because people will always blame you for accidents no matter what happened. also carry one of those all-in-one devices that include a flashlight, something to break your window, cut your seatbelt, etc. in the event you manage to drive into a lake

Actually second this, had someone recently tell a story of how her nephew got shot and killed when he confronted someone for constantly brake-checking him. No dash-cams meant no video evidence, and the shitter got away with abusing the self-defense law.