
Continuity mistake: When Kay visits Michael in hospital the oxygen tube is sometimes running under his shoulder, sometimes across the pillow. (01:07:55)
NancyFelix
Continuity mistake: When Mary asks her father if she is just a front of the foundation she holds her arms to her chest. When the camera angle changes her arms are crossed on the table. Also her hair falls over her shoulder totally differently. (00:44:15)
NancyFelix
Visible crew/equipment: When Zasa's two henchmen try to kill Vincent and he shoots the second one through the hand, you see a bulge in the guy's palm just before it explodes to create a 'hole'. (00:34:30)
NancyFelix
Answer: Frigidaire introduced the feature in 1965. They would have been commonplace by the late 70s.
Captain Defenestrator