Forgot about last Sunday: I got a call from my friend Corey, asking me to pick him up from Dulles Airport. No problem. Except as I was leaving the house, I forgot my car keys. No problem. Except my car keys were attached to my house keys. That's a problem.
To make a mid-sized story short, my friend Paul drove over, we went and got Corey from the airport, and then went to an undisclosed location to get my spare key.