Revealing mistake: This is toward the end of the movie. The scene where Dr. Giggles has a waiting room full of his victims. If you watch closely, you will see the blonde corpse blink her eyes.
Dr. Giggles (1992)
1 revealing mistake - chronological order
Directed by: Manny Coto
Starring: Cliff De Young, Larry Drake, Holly Marie Combs, Glenn Quinn
Continuity mistake: When Jennifer is wheeled into the operating room, the nurse finds blood on the floor and discovers two bodies. Later, after the doctor has killed Jennifer's surgeon, she runs out of the same door, but there's no blood. (01:20:00 - 01:23:00)
Doctor Evan Rendell: Get ready to take your medicine, Moorehigh. The doctor is in.