This morning we were locked out at work.
Usually we lock the door with a deadbolt lock. The doorknob also has a push-button lock, but nobody has a key to that one so we just never lock it.
Sometimes we’ll forget to tell the new people about the locks, and if the new person is the last to leave, they will quite reasonably lock the doorknob because they don’t yet have a key to the deadbolt.
So this morning the doorknob was locked, and of course no one had a key.
I figured I might as well try the credit card trick before we called a locksmith.
Turns out that credit card trick does work, and is surprisingly easy. I feel both accomplished and delinquent.