I am working in a building with twelve floors, each of them inhabited by few hundred employees.
Each morning, when I arrive in time, there are two ordered lines of people waiting for one of the elevators. Politely, we wait in line and get in the closest elevator.
Usually, this does not take longer than 1-2 minutes.
Few days ago, I got in front of the line and waited, and waited, and waited. Then I waited a bit more.
What's wrong with the elevators this morning, I thought.
Then the guy if front of me moved a bit and said: 'Oops, nobody pressed the button to call the elevator!'
And he did press the button and one elevator came right away.