Corrected entry: When Batman saves Robin from falling during the climax, right around when Robin says "Thanks", you can see that both the Batman and Robin costumes have hidden "vent-holes" cut into the underarms (likely to help the actor's skin "breathe" and to help air circulation keep them cool in the heavy costumes), with nothing but black cloth underneath.
Corrected entry: A conservative estimate of the acid-filled vault's weight is about 4 tons, most likely much more (a previous corrector suggested it was a special light-weight safe that Two-face installed. You can tell from Batman's difficulty in lifting the door that it is solid metal). The strongest industrial cable would need to be at least 1/2 inch thick to hold the weight, even more considering it would have to withstand the additional force as the vault makes its downward arc. The 1/8 inch thick cable that Batman uses would have snapped like a thread under the weight, no matter what it was composed of.
Corrected entry: When two-face put the club on the helicopters steering wheel, he never locked it. He just put it on and jumped out, they don't lock without a key. (00:11:10)
Corrected entry: When Bruce goes to visit Chase for the second time, (when she gives him the Malaysian Dream Warden) at one point we hear her tea kettle whistle. She leaves to go get it. But if you listen closely, you will hear that the kettle stops whistling just barely after her footsteps stop and long before we hear the door close. And then, about 7 seconds later she comes back with a cup of tea. Who can make a cup of tea that fast?
Corrected entry: When Edward visits Two-Face: Edward enters, introduces himself, endures Two-Face's threat, then goes to demonstrate his "box". Ed walks forward (toward the camera), and picks up two of his "boxes" from a table in Two-Face's apartment. How'd they get there? Ed hadn't started selling them yet, so there is no real explanation as to why the "boxes" would already be in the apartment.
Corrected entry: When Chase summons Batman with the Bat-Signal: she tells Batman that she pinpointed a weakness of Two-Face: his coin. How could the good doctor know about that? Unless she talked to the guard, which is probable, but not in the movie, there is no way she could know about Two-Face's coin.
Corrected entry: When Two-Face attempts to steal the rather sizable and presumably solidly built safe there is a lack of basic rigging knowledge. First of all the single chain would not be able to hold the safe by itself much less one filled with fluid. Secondly this amazing chain is connected directly to a winch inside the helicopter. Unless one uses a specially made adapter a load like that would begin to spin and swing with the motion of the rotors. Finally they pull the safe straight out of a building in the middle of downtown, the helicopter would almost have to have it's nose straight up to accomplish this and lots of room to maneuver. However the magical single prop helicopter combined with the magical chain seem to have no problem with such a difficult load.
Corrected entry: It's hard to believe that a spontaneous act of throwing acid on Dent's face by the mobster would result in a perfectly even separation down the exact middle of his face. Even with the folder protecting one half, the chances of the acid falling so perfectly seems remote.
Corrected entry: In the scene where the Riddler invades Two Faces' Lair, he has nothing but his cane with him. But when he proceeds further into the lair, he picks up two of his "boxes." They were there before he got there.
Corrected entry: When Batman and Robin go after Riddler, they approach in a Batwing and Batboat that appeared to be in a lower level of the batcave (this is assumed since Riddler destroyed whatever he saw in the cave) however, Two-Face and Riddler sit down to play a game of "Battleship" and have little toys of the very same vehicles. Are we supposed to believe that Riddler decided to take a picture of these vehicles in order to make little models instead of just blowing them up too? He's insane, but not stupid.
Corrected entry: Batman missed two prime opportunities to identify the Riddler. Not only could he have scanned the riddles for fingerprints (as we saw with the second riddle that Nygma doesn't wear hand protection), but shouldn't his expensive mansion hiding the Bat Cave have security cameras at the front gate that could've caught Nygma placing the riddle there?
Corrected entry: Why would a group of young children go trick-or-treating at night to Wayne Manor, which is in the middle of the woods?
Corrected entry: When Riddler meets Two-face for the first time, he has an orange buzz hair cut. Days later, he has his regular dark hair back to a longer length. How in the world did he grow his hair back so fast?
Corrected entry: Edward Nygma goes from a huge prototype model of his device to a small streamlined gadget in the space of a single cut scene. How did he shrink down his life's work in such a short time? It seems like something like that would have taken at least 6 months to do the re-engineering and build the company infrastructure to produce it. Wouldn't this have aroused the suspicion of the worlds greatest detective? I mean, what kind of crazy industrialist builds his headquarters on an island in the middle of a river?
Corrected entry: In a gas turbine engine, as installed in the Batmobile, a full forward position on the fuel control lever(commonly called a throttle or power lever), is full power. During the chase scene before he escapes up the side of the building, he pushes the lever forward to slow down, and pulls it back to speed up. This would be extremely confusing to a pilot versed in turbine engines (the Batwing from the first Batman movie).