A bike disappeared off my porch. I was too embarrassed to tell the world, since I had just recovered a stolen bike which was also unlocked on my porch.

Two months later, I saw my bike locked up at the train station. After a few seconds, I realized I was the one who locked it up there. I rode to the train station, took the train to the city, and met my wife there, who drove me home to the house.

That's a senior moment if ever there was one.