It is the terrifying picture scaring internet users in their thousands. What at first appears to be an innocent picture of a front room masks the spine tingling face of a hidden demon.

Demon behind the sofa: Scary face goes viral as Twitter and Facebook users spread the fear. By RICHARD HARTLEY-PARKINSON Updated: 13:51 EDT, 31 January 2012 ...

It's like a real life horror flick. Certain people feel like they're seeing monsters everywhere due to a frightening, ultra-rare condition that causes everyone to look like they have an evil smile ...