It was also appropriate because singing could be heard inside a room.]Mundson: How did you know?Johnny: How""d I know what?Mundson: So you don""t know.Come.(He opens his outer bedroom door and faint singing is heard through the doorway) This is where the canary is, John.Plot SynopsisOpening Prologue:The opening was composed of a zoom-shot into dripping Japanese-like characters (or glyphs) on a computer screen displaying columns of greenish numbers, followed by the film""s title.[Coincidentally, she is wearing a similar, look-alike shirt - with red and white horizontal stripes - an obvious hint that she is in his identical line of work!].Zombie twin sister Jane failed to devour horse meat during the demonstration, in front of everyone (including zombies released from the stable to watch - although Muldoon was hopeful: "Who knows, maybe they""ll learn something").