Continuity mistake: When Irving goes to see Carmine near the end of the film, his glasses start out being tinted, but when he takes them off, as Carmine hits and kicks him, the tint has gone; even outside they're tint-free.
American Hustle (2013)
1 continuity mistake - chronological order
Directed by: David O. Russell
Starring: Christian Bale, Amy Adams, Bradley Cooper, Jennifer Lawrence
Factual error: In the scene at the airport when the jet arrives, a Diamond Da-40 is seen in the background. This aircraft was not made until the early 90's, a decade after the scene takes place.
Irving Rosenfeld: She was the Picasso of passive-aggressive karate.
Trivia: The events of the film are inspired by and loosely based on the real-life "Abscam" - an FBI sting operation during the late 1970's and early 1980's.
Question: Why does Jennifer Lawrence have a neck brace on?
Answer: She wears a neck brace because she was in a car accident, she mentions the state of the car during the conversation.