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The candy factory name, Jolly Jack, is a tribute to "Jolly" Jack Kirby, a legendary comic book artist and writer. See more...
Batman Beyond: Return of the Joker (2000) - 5 mistakes
Directed by Curt Geda, starring Angie Harmon, Dean Stockwell, Kevin Conroy, Mark Hamill, Teri Garr, Will Friedle (add more)
Deliberate "mistake": You might be wondering where Terry suddenly comes up with Jolly Jack all of the sudden after escaping the lab. In the commentary, they say that the Joker, in his transmission to Terry in the lab, was supposed to be eating out of a candy jar with "Jolly Jack" on it, but couldn't have it due to time constraints.
Continuity: During Barbara Gordon's flashback to when Robin went missing, when Batman and Batgirl enter Arkham Asylum, Harley Quinn alerts the Joker that they have company. The Joker is seen with a pipe in his mouth. He takes the pipe into his right hand as he starts to come down the stairs. In the very next shot, the pipe is missing.
Deliberate "mistake": The device that rises out of the Jolly Jack factory and summons the laser beam shatters the decorative head, appearing to do so for the first time. However, we have already seen the destructive beam in action, meaning that device must already have emerged. This was acknowledged on the commentary by the filmmakers who wanted to show the visual metaphor of the Joker driving the young Tim Drake insane.






