The designers of some elevators include a hidden feature that is very handy if you’re in a hurry or it’s a busy time in the building (like check-out time in a hotel). While some elevators require a key, others can be put into 'Express' mode by pressing the 'Door Close' and 'Floor' buttons at the same time. This sweeps the car to the floor of your choice and avoids stops at any other floor.
http://www.lifehack.org/articles/lifehack/elevatorlift-hacki...
I wonder how much truth there is in this.