I apologize, it must have sounded daft. As I said, it took me a few moments to catch on myself, but that's the fun of it.

As to my elevator comment, it was a joking reference to Hitchhiker's Guide based on this part of the story:
Lift descends. Door opens.Marvin
Hello Lift.
Lift
(Soft muzakky sort of voice) Hello. I am to be your elevator for this trip to the floor of your choice. I have been designed by the Sirius Cybernetics Corporation to take you, the visitor to the Hitch-Hiker's Guide to the Galaxy, into these, their offices. If you enjoy your ride which will be swift and pleasurable then you may care to experience some of the other elevators which have recently been installed in the offices of the Galactic Tax Department, Boobiloo Baby Foods and the Sirian State Mental Hospital, where many ex-Sirius Cybernetics Corporation Executives will be delighted to welcome your visits, sympathy and happy tales of life out in the big wide world.
Zaphod
Yeah? What else to you do besides talk?
Lift
I go up or down.
Zaphod
Good. We're going up.
Lift
Or down.
Zaphod
Yeah, ok, up please.
Lift
Down's very nice.
Zaphod
Oh yeah?
Lift
Super.
Zaphod
Good. Now will you take us up?
Lift
May I ask you if you've considered all the possibilities that down might offer you?
Zaphod
Like what?
Lift
Well, er, there's the basement, the microfiles, the heating system... um. Nothing particularly exciting I'll admit, but they are alternative possibilities.
Zaphod
Ah, Zarquon's knees, did I ask for an existential elevator? What's the matter with the thing?