Continuity mistake: As Mark sits down next to Dan and reaches towards his backpack, in the very next shot he's pulling out a history book, even though he has not gotten anything out of the bag.
Continuity mistake: When Dan and Louise are talking about graduation moments in the kitchen, Dan's iPhone keeps changing positions in his shirt pocket. In some shots, it's upside down, and in others, it's upright. (00:07:56 - 00:09:26)