We pulled into a crowded service plaza to use a restroom, only to find the power out in half the building. When I walked into the men's room, it was pitch black except for a circle of light bobbing over the changing table. There was a dad at the table, holding a mini-Mag Lite in his teeth to keep both hands free as he put a clean diaper on his child. He finished, saw me and John waiting our turn and handed me the flashlight. "Take this. A guy in here changing his kid gave it to me. Give it to the next guy who needs it." With that, he disappeared into the gloom.