The Exercist

Fredkien the Director of the Exorsist would occationally slap the actors in the face to get that  surprised startel look for the camera:Fredkien the dir would also requier  his  entire set  to be Refrigerated so that the viewers could see the  breath of the actors,also little known fact befor  they start filming  for the day he play unsettling  loud music over the loud speakers .....Also commrcialy the quija board made nearly a Half A Billion dollars for Warner Brothers  go figure .....Just some fun facts ...