Joseph Kahn has said the most expensive sequence in the movie is the circular tracking shot around various characters in the library, showing the passage of time by portraying different music eras. This is because the music licensing for using these songs cost so much.
Easter Egg: At 08:29 during the credits, a single person (Karl Verge) has been awarded several trophies, one of which is named the Prince Humperdinck Award for the Fencing Club.
Film debut of Shanley Caswell and Destiny Austin.
The clumsiness of the killer Cinderhella and the unwillingness of the cops to take Riley's story seriously echo Sidney's experience in the Scream franchise.
The cop tells Riley that 'Iron Man was a great movie'. Later when she enters the time machine the HUD looks exactly like the inside of Iron Man's helmet.