I may have told this story before but I had two Furbies when I was a wee 'un. One from Santa and one from my parents. There was a baby one and a big one so I tried to get them to talk to each other but it never quite worked.
I eventually shoved them in a cupboard which was opposite my bedroom door. Forgot about both of them. Walking by it one night many months later I heard, barely audible and crackling, "Ooh! Me... SCARED!" from the darkness and bricks were indeed shat. No idea what set it off so it just adds to the suspicion they are possessed.