Get in the elevator, roll up your sleeves and wind up the hammer. Try to use just the right amount of strength to reach the floor you want. And try to avoid hitting anyone on the head. But only the strongest will be able to reach the highest floors of the skyscraper.
The strength it takes can be adjusted,
to the point where if you hit the buzzer at the top, rocket boosters are activated and the elevator flies out of the building and into orbit.
Could be a good gimmick for an orbiting gym