1. The word zombie comes from the Latin ‘zombus’ meaning ‘lumbering threat suitable for a feature-length film’.
2. Zombies were not originally interested in brains. The first zombies, which appeared in a silent film in 1918, were originally after ‘body’. This was changed after they were accused of being shallow.
3. British zombies cannot over-ride the ‘happy birthday’ reflex: the duty to join in with a rendition of ‘happy birthday to you’ is so deeply ingrained that, should someone start singing the song, all reanimated corpses will stop attempting to eat you, and growl “hurgh- purgh- burgh-duh tee-oo”.