h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

Instead of slowing you down, the revolving door simply reverses your direction of motion (a demonstration of the First Law of Thermodynamics).
The frustration this instils in the user increases entropy (a demonstration of the Second).
Revolving doors are often installed in the reception areas of corporate headquarters,
although whether this is to keep the staff "indoors" or the public "outdoors" has never been adequately established.
How such corporations obtain new recruits from the general public is also a mystery
(as indeed is the method by which staff members who have been fired/retired/died of door-induced frustration leave the building).

I think I'll submit that as an entry

You can now see "revolving doors" at:
http://www.h2g2.com/P51580

I've written about normal doors at: http://www.h2g2.com/U32373
I like the door article though.

I don't think you should put the key part of the address in the hyperlink - this lets anyone else log in as you, which is a bit compromising.