Continuity mistake: In the bar birthday cake scene Cam is handed a piece of cake twice. (00:10:45)
Continuity mistake: In the opening scene where the professor asks Ben "what can you tell me that's gonna dazzle me?" they sit in his office with a lit fireplace behind Ben, who wears a suit and tie. When that scene continues at the end of the movie with Ben answering that question, he is shown sitting in a totally different environment and outfit. (00:07:20 - 01:53:38)
Answer: Casinos have always looked out for people counting cards, even before the real events that inspired this movie.
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