Home People Sally Mattison Sally Mattison movies Sally Mattison movies Sally Mattison Movies (7) Sleepless Nights: Revisiting the Slumber Party Massacres (2010) As Herself. Concealed Weapon (1994) As Associate Producer. Slumber Party Massacre III (1990) As Director. Ultra Warrior (1990) As Co-Producer. The Haunting of Morella (1990) As Producer. Overexposed (1990) As Associate Producer. Masque of the Red Death (1989) As Producer.