Visible crew/equipment: After Norman runs from the men that have him captive, Norman is dragged back to The Box. As he is being dragged you can see the mic cord across his stomach.
Other mistake: After the scene where Norman texts Bradley that he is coming over, the next shot is Norman looking at the small transcript of his messages to her. If you look, you can see that the transcript starts at 2:34 PM. However, it's nighttime. You can even see the time says 2:34 PM at the top of the phone screen. Also, the original text of 'Hey' is missing although he texted her immediately after receiving it with 'I want to come over and see you.' (00:37:40)
Dylan Massett: You'll do anything to get your way.
Norma Louise Bates: I've never gotten my way, and that includes being your mother.