Trivia: The number A113 (which appeared in Brad Bird's previous films The Incredibles and Ratatouille) makes two appearances here. The first is on the side of Hanaway's ring in the flashback sequence, and the second is verbally as Ethan's agent ID that he recites through the phone after he escapes from the hospital. (00:14:40)
Trivia: Stan Lee makes his customary appearance as the driver of the white pickup truck that tries to free Mjolnir from the ground. (00:36:10)
Trivia: Stan Lee cameo: When Captain America did not come out for one of his shows, a short man came out to tell the announcer he would not be appearing. Stan Lee says "I thought he would be taller."