Continuity: In the scene when Freddy and Janet arrive at Lawrence's mansion as his house guests, they arrive at night. Lawrence takes them upstairs and asks Janet to waltz with him in his ballroom. The scene takes place only a few minutes after their arrival. As they begin to dance, Freddy crawls to the door and starts moaning. Lawrence then shuts the ballroom door in his face and resumes dancing with Janet. As the shot cuts back to them dancing, a large window is plainly in view and daylight is streaming in brightly through the sheer curtains.

Continuity: Right before Steve Martin and Michael Caine make their bet, Steve Martin walks up to Michael Caine sitting at a little white table. Every time the camera goes back to look at Michael Caine his handkerchief in his breast pocket of his jacket moves from sticking way out of his jacket to barely visible.

Visible crew/equipment: In the shot where Freddy is rushed away by Janet in his wheelchair upon seeing the dancers, the reflection of the boom operator chasing after them can be seen in the mirror on the wall that they are running along.