Other mistake: Towards the beginning of the film, the teacher counts 19 students then says one is missing, implying there are 20 (including Mike) However, Mike ends up being paired with the teacher, despite there being an even number of students and therefore everyone should have a partner.
Monsters University (2013)
1 other mistake - chronological order
Directed by: Dan Scanlon
Starring: John Goodman, Steve Buscemi, Billy Crystal, John Krasinski
Continuity mistake: In the scene when Mike is at the school door lab. When he swipes the access card the door swings out. But when the campus police try to get in it is blocked from the inside, indicating the door opens inwards.
Upvote valid corrections to help move entries into the corrections section.
Suggested correction: If you look carefully, you will see, that those are actually two different doors, which even have hinges on different sides. There's some space between them in the entrance to the lab, it can be seen just before Mike enters.
Mike Wazowski: I've been waiting for this my whole life! I'm gonna be a scarer!
More trivia for Monsters University
Question: Why did the ROARs congratulate Sully and invite him to join them after seemingly losing the Scare Games to Oozma Kappa?
Answer: They said he could rejoin the fraternity as long as he proved he could be a great scarer, so his victory showed that he was good enough for them.