Character mistake: Kirsty tells Detective Ronson to destroy the mattress because Julia died on it and could come back. In the first Hellraiser, Julia died on the stairway after being stabbed to death by Frank. (01:16:12 - 01:16:41)
Suggested correction: She ended up on the mattress. When Kristy grabbed the box and Pinhead says his famous line "we have such sights to show you".