Nothing happens.
You weren't really expecting anything, were you? It just doesn't fit in with the genre.
Oh come on, don't tell me you're disappointed. I know, I know, you were expecting some hilarious little blip, or the Spanish Inquisition, or something. Well, no, not the Spanish Inquisition, because no one ever expects them. But I'm sitting here as I write this, watching television and stuffing barbeque potato chips into my mouth, and absolutely nothing humorous is coming to mind. So... hey, maybe next time. Okay?
>xyzzy
Nothing happens... again.
>xyzzy
Again... nothing happens.
>xyzzy
Still nothing happens.
>xyzzy
Stop doing that.
>xyzzy
Please stop doing that.
>xyzzy
Okay, fine. I'm disabling the command now.
>xyzzy
I don't know the word "xyzzy".
>xyzzy
I really don't know the word "xyzzy".
>xyzzy
Well, that didn't work. Look, here's 5 dollars. Just... take it and promise to stop typing that. Nothing is going to happen!
[The game isn't lying about the 5 dollars; check your inventory.]
>xyzzy
Oh, I see. Okay, fine. If that's the way you want to be.... In a total of 10 turns, you have achieved a score of 0 points out of a possible 70, giving you a rank of Hobo.
You may restore a saved game, start over, quit, itemize your points, or undo the current command. Please enter RESTORE, RESTART, QUIT, FULL, or UNDO: > — Scavenger