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.
In the scene of Miguel and Hector on the rocks at the bottom of the huge sinkhole, Hector's left foot has six toes.
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.