John and I walk through a service station on our morning walk, one that has a popular café under the same roof. Drivers are not always aware of us, so we try to walk defensively. Hungry drivers might be especially dangerous. A large pickup truck whizzed into a parking spot and rocked when it stopped abruptly. We were about to walk behind it when we saw the backup lights go on. I almost put out my hand to stop John when he saw the danger, too. I was wondering when we would know it was safe to go forward, and then I knew without a doubt. I could see under the truck as his boots hit the ground.