My dad called me to tell me he had 4 people in his livingroom for the past 4 days who won t leave. I told him to call the cops. He said he can t because HE will be the one taken away because he knows the people aren t real. I almost fell over because my dad is in good health with zero history of drug use or mental illness. Everything is perfectly normal as long as he stays out of the livingroom, that s the only place he sees them. What could cause these sudden, contained visions with no other symptoms? And he is not psychotic because he is aware that the people aren t real. Please help, it s scarey!