This isn't the only time. It's done it at least four times. What causes this? It catches me off guard. Today it did it while I was driving out of town. The car flashes brake and shoke the wheel. I don't like it because it totally caught me off guard. Each time there's been nothing. Now I'm am paranoid it's going to do it again but also apply the brakes. Are these just false positives or should I take the car in?