Héctor: What are you doing?
Miguel: I'm walking like a skeleton.
Héctor: No, skeletons don't walk like that.
Miguel: That's how you walk.
Héctor: No, I don't.
When they jump in the pool, they drop the guitar. When they jump out of the pool their guitar is no longer in the pool.
The Pizza Planet truck from "Toy Story" passes by Miguel's house near the beginning of the film. Also in the marketplace, a small Nemo doll is on a table and dolls of Mike Wazowski and Woody are hanging from a stall.