Kill Crazy had a theory that the prison food was the cloning experiments from Z Deck that gone wrong. Kill Crazy got this idea when, in the prison canteen, Kill Crazy got a starter with "two noses" in it, and "it sneezed". Two other prisoners, Dave Lister and Jimbo Steel, were witness to this event.
Lister later told his cellmate Arnold Rimmer about the story, but waited until Rimmer was eating (and swallowing) to tell him about it. Rimmer was disgusted, but dismissed the story, saying that it would be illegal to so, even to prisoners, and that Lister, Kill Crazy and Jimbo Steel were all - well, crazy. ("Pete: I", Series VIII)