There are some people who have said that the close door button can be used on some elevator as part of an 'override' way of skipping past floors that would normally be stopped at, such as for police/security to go directly to where they want. No idea if there is any truth to that though or what sort of button press combination would be required.
Yep, I've heard this. Apparently you hold down the close door button and then hold down your floor number until the lift starts moving and then release. Apparently it's only programmed in on some lifts. I've tried it a few times, but lack the evidence to back up the claim 100%.