While learning to twirl a cane, Jim Carrey reportedly broke around a dozen prop canes and some of his trailer furniture.

The Robin costume weighed 41 lbs.

Dick Grayson suggests "Nightwing" for a hero name; an in-joke for the comic books, where Dick Grayson now appears as Nightwing, an identity he took after he abandoned the Robin costume in 1980s.

In the film there is a doctor named Burton. Tim Burton directed the first two Batman films and produced this sequel.

At one moment, to Batman's surprise, Robin exclaims: "Holey rusted metal, Batman!", then explaining: "The ground, it's all metal. It's full of holes. You know, holey" - a jokey reference to the old US TV show "Batman" (1966) with Adam West, where Robin would yell his trademark exclamations of surprise every once in a while: "Holy something-or-other, Batman!".

The scratches on the tails side of Two-Face's coin form the letters HD, the initials of Harvey Dent, Two-Face's former identity.

Elizabeth Sanders, who plays Gossip Gerty, is the widow of 'Bob Kane (I)', the man who created the Batman character.

The design of the Flying Graysons' costumes was a reference to the red, yellow and green spandex that Robin wears currently in the comic books.

In Canada, the French version of the Riddler's name is Le Sphinx.

Chris O'Donnell's sister can be seen directly behind him in the party scene where Robin is first introduced to the public.

In the movie, there is a scene where Two-Face keeps flipping his coin until he gets a result he wants. In the comics, a key element of his split personality is that he unquestioningly accepts the result of a single coin toss concerning any decision he makes.

Rene Russo was originally cast to play Dr. Chase Meridian when Michael Keaton was still attached to the project as Batman. However, when Keaton dropped out of the project and was replaced by Val Kilmer, Russo was deemed too old to play his love interest and was replaced by Nicole Kidman.

William Baldwin was reported to be considered for the role of Batman.

In the original Batman (1989), District Attorney Harvey Dent was played by Billy Dee Williams. Williams accepted the role with the knowledge and expectation that Dent would eventually become Two-Face: he reportedly had a clause put into his contract reserving the role for him in any sequels, which Warner Bros. had to buy out so they could cast Tommy Lee Jones.

Chase remarks about "Or do I need skin tight vinyl and a whip", an obvious reference to the "Catwoman" character in Batman Returns (1992).

When left at Wayne Manor, Grayson informs Wayne that he is leaving. To this, Bruce replies that the circus would be halfway to Metropolis, which is the city of Superman.

The movie was going to be shot in Cincinnati, using the old subway tunnel. The exterior of the Gotham City Hippodrome (the arena where Dick Grayson's family is killed) is based on the exterior of Union Terminal, a famous 1930's Art Deco train station in Cincinnati.

The exterior set for Two-Face's hide out is the same set used in the first disappearance of Max Schreck (Christopher Walken) in Batman Returns (1992).

Exterior scenes of Wayne Manor were filmed at the Webb Institute of Naval Architecture on Long Island, NY. The production team had to change the school's "W" on the entrance gate because it had an anchor behind it.

Actors Kimberly Scott (Bruce's assistant) and Michael Paul Chan (a worker at Wayne Enterprises) came back for Batman & Robin (1997), but in different roles, playing scientists at the Gotham Observatory. Joel Schumacher frequently uses them in his movies.

Olympic gymnast Mitchell Gaylord was a stunt double for Chris O'Donnell.

Val Kilmer learned he was the new Batman while he was literally in a bat cave in Africa, doing research for The Ghost and the Darkness (1996) He accepted the role without reading the script.

25 minutes of the film were digitally color corrected at 2K resolution - a very early example of digital grading for motion pictures.

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Continuity

(at around 1h 22 mins) When Batman shows up at Chase's apartment, he comes in through her balcony. It is pouring rain outside, but Batman is totally dry.

(at around 1h 40 mins) When Batman flies out in the Batwing, at first there is no rear wing. In the next shot, the rear wing is there.

(at around 30 mins) Before Bruce arrives at Chase's office to show her the riddles he had been receiving, we see him get out of his car, walk up the stairs, and break Chase's door down. He does not have the riddles in his hand until he is ready to ask her about them, and they are way too big and bulky to have fit into his pocket.

(at around 1h 4 mins) When Bruce is speaking into his video watch (when Alfred tells him the Batmobile is missing), each time the watch is seen in closeup, Bruce's finger moves up the side. It must have been filmed only once, then reused, with the video of Alfred added later.

(at around 53 mins) When The Riddler breaks into Two-Face's hideout, he only has his cane with him, but a few minutes later, when he demonstrates how "the box" works, the two green receivers that it uses are already there.



Factual errors

Boiling acid does nothing to change the chemical's pH measure. As with any other liquid, boiling any acid causes it to turn into a gas. This can harm people as it creates toxic fumes that can cause severe chemical burns, but the audience never sees the security guard or Batman affected in that way.

(at around 9 mins) There is no way that Batman's grappling hook could not only pierce through solid concrete but also support the weight of a two ton safe.

When Robin is threatening to leave Wayne manor, Bruce looks over his shoulder and says that he's nearly out of gas. Old motorcycles didn't have fuel gauges: if you ran out of fuel you just switched to reserves which would give you another 20 miles or so.

When the news is on television about how Harvey Dent burns the side of his face in a court trial, the amount of acid that is thrown at him does not match the wide and cartoonist scars he later has on the entire left side of his face and neck.



Incorrectly regarded as goofs

(at around 16 mins) When Bruce uses the torpedo to access the batcave, he travels at nearly 200 mph for almost a minute, indicating that the batcave is some distance below Wayne Manor. But when Dick finds the batcave, it appears that it is only a few stories below. Bruce is traveling from his office in downtown Gotham, which is quite some distance form Wayne Manor, which explains the speeds at which he travels to get there.

(at around 1h 30 mins) Young Bruce Wayne drops his father's diary when he falls into the cave, but lands with it in hand. This may be a deliberate, as the scene is a subjective view of a confusing, traumatic moment, when memory can become unreliable.

(at around 56 mins) When The Riddler tells Two-Face the bargain, Two-Face gives him the "heads, we accept", and "tails, we decline" speech. He then tosses his coin into the air. We then get a close-up shot of the coin. But when it is coming back down, it is clear that it lands on tails, not heads. But, traditionally a coin flip involves catching, covering and flipping the coin again, so we see heads down, which would flip to heads up and Two-Face accepting.

No one ever questions how Bruce Wayne was able to overcome Two-Face's thugs at the circus. However, in some continuities, including Batman: The Animated Series (1992), Bruce Wayne is shown to be a competent fighter/martial artist who attends gyms/dojos/etc. It's likely that's the same case with this movie, and if so, his strength/fighting ability would be public knowledge.

Joel Schumacher's Batman movies are not set in quite the same universe as Tim Burton's, so differences between them (in the back stories of Bruce Wayne and Harvey Dent, for example) are not goofs. (Despite having actors Pat Hingle and Michael Gough playing the same roles).



Revealing mistakes

(at around 52 mins) When The Riddler and Two-Face meet for the first time Riddler can be seen Jim Carrey in his green costume in the background, waiting for his appearance. Just as Sugar says: "I made your favorite tonight" look to the right side of the screen. Not a goof as he was eavesdropping on them talking as he already had his brain boxes in Two Face's lair, which he didn't have on him when he made his entrance.

(at around 57 mins) When The Riddler and Two-Face are committing their first robbery (at the jewelry store) the Riddler breaks a glass display case and grabs a very big diamond and says: "Here's a good one". However when he holds it up to look at it, the frame changes and it has suddenly been reduced to a tiny diamond barely visible. Then Two-Face shows him a big diamond (probably the one we saw earlier) and says: "No, no, there is a good one". Jim Carrey apparently picked up the wrong diamond, and in the next frame given it to Tommy Lee Jones. It is also obvious that they tried to hide the frame switch in the editing of the film.

(at around 1h 30 mins) A pole can be seen on the giant bat as it comes toward young Bruce.

(at around 10 mins) The eye-drop ad explodes before Two-Face's Yin-Yang helicopter even crashes through it.

(at around 1h 24 mins) After Batman saves the guests at the Nygmatech party, a newspaper is shown with headlines of the incident, but the actual text of the stories is about the trial of the murderer of Bruce Wayne's parents.



Crew or equipment visible

Obvious stunt double for Batman when he fights the goons at the gala.

(at around 42 mins) Reflection of the lighting equipment on Dick's motorcycle helmet when he attempts to leave Wayne Manor.



Plot holes

(at around 1h 1 min) The Bat-computer reacts to an intruder in the Batcave by turning the power on for everything, and unlocking the various Bat-vehicles. This response actually makes it easier for an intruder to steal the Batmobile, than if the system did nothing.

(at around 17 mins) When meeting Batman at the Bat-signal, Chase Meridian says "Last night at the bank, I noticed something about Two-Face: his coin." Two-Face never uses his coin within view of her at the bank, and she could not have seen it from the ground if he had. This scene was originally written to take place after the circus scene, where she really did see him use his coin. The bat-signal, seen from Wayne Enterprises, was actually supposed to be what led Bruce to the bank in the first place.

For some reason Chase never questions why Bruce just disappeared during Nygma's party after Two-Face shows up.



Character error

(at around 1h 3 mins) A clipboard can be seen on Dr. Meridian's desk with the word 'schizophrenic' misspelled as 'schizofrenic.'

Towards the end, Batman's riddle suggests the myth that bats are blind, which isn't literally true.

When the news is on television about how Harvey Dent burns the side of his face in a court trial, it doesn't make sense for Batman to be there in bright daylight (he only comes out at night), in addition to being allowed to be present to a masked vigilante at a court trial.

Two Face's motivation for wanting to kill Batman makes no sense, Batman didn't know they were going to throw acid in Dent's face, court security should check people before they enter the room, plus Batman shouldn't even being present in a place like a court trial being considered a masked vigilante and in broad daylight (he only goes out at night).