Visible crew/equipment: When Tiffany almost falls off of the ledge, you can briefly see a wire on her back.
Hellbound: Hellraiser II (1988)
1 visible crew/equipment mistake - chronological order
Directed by: Tony Randel
Starring: Ashley Laurence, Doug Bradley, Kenneth Cranham, Clare Higgins, Imogen Boorman
Plot hole: When the policeman asks Kirsty at the beginning who came when she solved the box she says the Cenobites; she had no way of knowing what they were called. Frank only told Julia; Kirsty didn't hear it anywhere and the Cenobites themselves didn't tell her either.
Pinhead: Your suffering will be legendary, even in hell.
Trivia: Dr. Channard's name in the script was Dr. Malahide. "Channard" is derived from Christiaan Bernard, who performed the world's first successful heart transplant.
Question: When Elliot Spenser is being transformed into Pinhead, who was cutting lines into his face and head and driving nails into him?
Answer: Presumably another cenobite/cenobites. The choice not to show them makes for a better scene, as that moment is all about him, becoming the iconic Pinhead; the cenobites who made him that way are of no consequence to the story, and their own grotesque appearance would have distracted from his transformation.
Answer: All we can see (in abstract closeup) is serpent-like tendrils cutting him and driving the pins into his head. As someone else said, it's likely another cenobite, although alternately it could also be the same "contraption" that turns Channard into a cenobite late in the film, given the tendrils are similar to the ones he sprouts.