Years ago, when I was still an active cockpit flight crew member, the day's series of flights ended up in New York's LaGuardia airport for the night's layover. It was customary to drop off our "flight kits" in the operations department area before proceeding with our personal luggage to the hotel. As with most domestic U.S. airports, access to operations (usually located beneath the terminal concourse gate area) was via locked doors at the top of the stairwell leading downstairs. These doors, regardless of airport, were almost all of a "generic" design, and were opened by punching in a common code on the door's locking mechanism. Which door to choose at any given airport was selected from past experience, but we flew to many airports and keeping track of which one to utilize at specific airports could some times be a source of confusion...depending on how long it had been since you last were there. With great confidence I selected what I thought was LGA's correct door, punched in the code, opened the door and suavely entered.......a utility closet full of brooms, mops, and cleaning containers.
The door swung closed behind me.
Now, knowing that a professional appearance is always paramount when representing the company when in public view of fare paying passengers entrusting their lives to your godlike persona, I immediately knew that an instantaneous exit would entertain the view among those observing my error that I had lost my bearings, and would only serve to demean the piloting profession's hard earned reputation.
I stood stock still in the darkness of my closet prison, and slowly counted to 15. I then "about faced" within the narrow confines of my penitentiary, composed my best "I meant to do that!" countenance, opened the door, and casually exited the enclosure, avoiding all eye contact, and swiftly made my way to the correct door.
To this day I have no idea if anyone was the wiser, but I have my suspicions.