A fake channeller (Mary Woronov) finds herself possessed by a demon when the Warlock asks her to contact a spirit for him.
Suddenly she begins to gasp and choke. Her hands almost involuntarily close around a crystal, and it shatters. Her head falls forward onto the table, and then snaps back up, and her face has become demonic; her teeth huge and like shark's teeth.
When the contact ends the channeller collapses face-first back onto the table – dead.
Pat Gerhardt was the makeup artist; Alec Gillis & Tom Woodruff Jr of Amalgamated Dynamics were responsible for the channeller makeup effects.