My wife's key to my car was broken, so I took the initiative to have a new one made, along with a clicker for my car which she has never had. I went to pick them up, came back, and had everything except my wife's original key, so I was one key short. I called the key place and they looked for it in the store and sidewalk. Then I called the drycleaners where I stopped afterwards and they looked in the store and sidewalk. Nothing. I figured eventually it'd reappear.
Two days later we took the other car, Allison's car, out for a long weekend. When we returned from being out of town, I went to put something in my car and there was the key, inserted in the outside of the passenger side door.