Continuity mistake: As Kirk and Spock Prime are arguing about Spock meeting his younger self, the shots from behind Spock show his hair, ear, and coat to be illuminated by a blue light. But the reverse angles have no evidence of this light at all. And when Kirk walks away, Spock is still standing in the same spot. Now suddenly Spock is all illuminated by blue lights that they were obviously not standing under moments before. (01:26:00)