You're an ordinary Gotham citizen, about to get into your car. Suddenly, Batman runs up to you.
"I need to borrow your car!"
"Wha-"
"I need to help Robin!"
"I've got work -"
Batman throws you a set of keys and points to the Batmobile. You wordlessly hand over your keys.
"Thanks!" he yells, jumping behind the wheel, "I'll return with the car or a better replacement vehicle in 12 hours!"
You drive the Batmobile to work. You realize you forgot your parking pass. No one seems to mind. No one gets much work done that shift, either.
The next morning you leave your apartment to find your car back in your parking spot. The tank is full and the oil has been changed. There are flowers and a gift card in the passenger seat. You don't know how Batman switched the keys.