A hypothetical:
The new residential building you live in has two elevators, but one of them is out of order for repairs.
The building is also rather tall, maybe around 15 stories high, or maybe as high as 30.
After you wait quite some time for the elevator, and as you prepare to get off the elevator, you have a brief window to hit the button and send the elevator somewhere else.
There is no one else in the elevator, and it hasn't been called elsewhere yet.
Where do you send it to?