@ Cinju - Thank God this was on the highway, which is always busy so he couldn't have hurt. But I agree I should not have let him touch the car. @ grey_hound - I agree one should be ready. Key is to stay calm and "think" and not allow the person to touch the car. Ensure that the cell phone and wallet is not inside the car and if you are coming out then take the key out as well. So even if the intention is theft it won't be easy. As correctly pointed out, don't show the wallet contents. If its a lonely road then don't stop.