An incredibly quick answer (correct answer) from Doug (e)DARING quickly finished off this round, with the answer that the quote is indeed from "The Hitchhikers Guide to the Galaxy"
http://www.imdb.com/title/tt0371724/
Go and pay Doug a visit at http://www.empireavenue.com/influencer/?u=DARING
The full passage was:
Questular: Don't you think this many ships is a bit, oh I don't know - excessive?
Kwaltz: The provisions are clear. Under subsection 37a these are the forces we deploy to protect the president in the case of an attempted or actual kidnapping - and these are the forces we deploy to apprehend any intentional or actual kidnapper.
Questular: You are aware, Commander, that the President kidnapped himself.
Kwaltz: Hence...
Questular: Do you have any idea how ridiculous this is?
Kwaltz: I don't have ideas Mr. Vice President. I just do what I do.
