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

I don't remember if the Land Shark knocked, but it was a pretty good spoof of Jaws:

http://www.jawsmovie.com/humor.html

Paraphrasing:

(Knock, knock)
Resident: Who is it?
Voice: Dry cleaning delivery.
Resident: We didn't take any closthes in.
Voice: Pizza delivery.
Resident: We didn't order pizza.
Voice: Fed Ex.
Resident: Oh, OK ... (opens door) ... Ahhhh!!!

Some friends immediately remembered this bit when I mentioned the "Shark Theme" music from "Jaws", composed by John Williams and initially criticized by director Stephen Spielberg: "Is that all of it?" Spielberg later said the music, including that unforgettable theme, was at least half of the movie.

the land shark would knock at the door and when asked who it was he would say " landshark" , the person at the do would say "who?" amd then the landshark would go " uuhhh......candygram" at which point the hapless victim would open the door to be consumed by the ravenous landshark. I still say landshark when I buzz my way into my mum's apartment.