Monty Python

In the Sounds directory of the original Creatures are two unused sound files, "say1.wav" and "say2.wav" that seem to have no obvious use at all.

However, if you reverse them, slow them down by 50% and stick them end on end...

You get some low quality audio from "And Now for Something Completely Different", a 1971 film by Monty Python! The source of the audio can be heard about 30 seconds into the original trailer for the film.

This was originally discovered and reported on alt.games.creatures by Pendragon.