You’re driving down the road listening to the radio and thinking about what you need to buy at the store when, suddenly, you hear a thump, thump, thump sound and the steering wheel starts jerking in your hands. For a split second, you think to yourself, “What the heck is that?” Then it dawns on you, “For crying out loud, I have a flat tire.” Of course, this scenario assumes you haven’t had a complete blowout and aren’t fighting to maintain control of the vehicle. In either case, you need to grab the wheel firmly and, first of all, ensure that you have control of the car. At the same time, assuming it’s safe to do so, you’ll want to let off the gas. Don’t slam on the brakes unless, once again, you absolutely have to. But take control of the car while remaining calm. At the first reasonable opportunity, you want to start pulling off of the road into a safe and level area. It’s possible you’ve had your flat where there is nowhere to pull over. In that, case, you’ll have to thumpety thump...