Don't keep loose objects in your car: A messy car can make for a messy accident. Golf clubs, for example, could be a hazard if you have to brake quickly. Other objects could slide or roll under your brake pedal. At best, you'll have to keep an eye on things as they slide about your car, which means you won't be able to give your full attention to the road. At worst, one of those same things could cause you to lose control of the car. A collision, small objects become big missiles, making impacts of 20-30 times their weight.