A few days ago, I had to change my return flight from a business trip to come to a different airport than the one I left from. A couple of days later Allison and I drove 40 minutes to pick up my car near my departing airport (SFO), and when we got there and I got to my car, I realized I didn't bring keys to my car. I only had the keys to Allison's car.
Luckily, Allison had her keys to my car. (otherwise she might have killed me). Heroine!