Other mistake: When Deckard visits the Tyrell Corporation, he prepares to test Rachel with the "VK" machine. He is shown putting his briefcase of the table and lifting the "VK" machine out and onto the table. If you look closely, the "VK" machine is already on the table and Harrison Ford is miming the lifting - there is nothing in his hands! (00:19:45)
Continuity mistake: Deckard shoots Zhora twice. Both times she is shot, you can see the wound explode out of her right shoulder. But moments later when she is on the ground dead, she is face down and you can see a bullet wound on both right and left shoulders. (00:58:50)
Audio problem: Deckard investigates the maker of artificial reptiles; an Abdul somebody. It's obvious that the dialogue was added as neither actor is in sync with the sound. The end of the scene has the storekeeper's voice telling Deckard the information he was seeking while Deckard's mouth is the one moving. Deckard's mouth continues to move even after Abdul's lines are finished and the scene cuts. This has been corrected in the 2007 Final Cut of the film, but exists in all previous versions. (00:48:45)
Continuity mistake: The original scene where Leon is being interrogated is different to the recording of the scene that Deckard watches as he is driving. Even what Leon says is different, in the original scene I think he says "Let me tell you about my mother" but in the recorded playback he says "I'll tell you about my mother", and the line is delivered differently.
Revealing mistake: After the snake lady is dead, eyes open, Deckard rolls her head from camera right to camera left. Her eyes move. (00:59:15)
Continuity mistake: When Decker shoots the snake-woman replicant, she hits the glass and in one shot you can clearly see that is not the actress that hits the glass, but a stuntperson dressed like her. This has been corrected in the 2007 Final Cut of the film, but exists in all previous versions. (00:57:50)
Revealing mistake: When Zhora dresses in Taffy Lewis' club she puts on high-heels. Later during the chase scene and when she flies through the windows, she is wearing normal boots. And when she is shot the second time, her right hand holds a control, probably for the blood bags on her back. (00:54:20 - 00:57:45)
Revealing mistake: Near the beginning of the film when Deckard and the other cop take off in the car to go to the police station, you can see the cables lifting the car up into the air. (00:10:05)
Revealing mistake: Near the end, just before Deckard goes into the final showdown apartment complex, a police car lands and asks Dekkard who he is. Deckard tells him and as the police car takes off, the strings holding it are painfully obvious. (01:27:40)
Other mistake: Bryant mentions that 'six skin jobs' escaped and that one got fried trying to get into the Tyrell building. Four of them die in the movie, so what happened to the last one? [In the "Director's Cut" and "Final Cut" versions the math has been fixed. Bryant now says that two of the replicants got fried, not one.] (00:14:00)
Continuity mistake: When Deckard shoots the snake-woman in the back and she falls through several layers of glass she lands on her stomach, with her head lying on the left side. In the next scene Deckard is standing beside her, but now she has turned her head, lying on the other cheek. Her arms also change position. (00:58:30)
Continuity mistake: When Zhora attacks Deckard, she isn't wearing any lipstick. After she is killed and they roll her over, she has bright red lipstick on. (00:59:10)
Audio problem: In one of the scenes at J.F.'s house, J.F. is talking to Batty and Pris. Batty is sitting down and starts talking about J.F.'s chess game. Batty says "your opponent" then J.F. says "Oh, Dr Tyrell." While he says this the chess game is shown, then it cuts to Batty and J. F. and he continues "I've only beaten him once at chess." For this line his lips are not moving. (01:18:45)
Continuity mistake: When Roy throws Deckard to the ground after having rescued him, Deckard's shirt has ridden halfway up his torso, but when the shot cuts to behind Roy, the shirt is down. (01:45:45)
Revealing mistake: When Leon and Deckard are fighting in the street, Leon swings at Deckard and puts a hole through a steel vessel where steam blasts out. It's clear that the spot where Leon hits has been cut out and is visible before he hits it. (01:02:15)
Continuity mistake: When Deckard makes a hardcopy of the picture on the screen, it doesn't match the screen picture. The screen shot is a profile of Zhora; the hardcopy is a frontal view. (00:46:00)
Continuity mistake: When Leon goes to sit down for his test, he appears to be wearing a name tag that is attached to the left breast of his outfit. Once he sits down, you only see the printing on the shirt. (00:05:00)
Continuity mistake: The dialogue between Holden and Leon in the beginning never matches the interrogation tapes during the films (excluding Deckard's recall a moment before he confronts Pris). Most notable are the time and speaking manner. It can be heard when Deckard and Bryant listen to the tape. (00:05:35 - 00:13:35)
Revealing mistake: As Zhora is crashing through the last window, after being shot by Deckard, there are dark pads visible around her lower arms. In few shots before, these are visible whilst crashing, but not whilst she is running or falling. (US theatrical version). (00:55:50)
Other mistake: When the woman puts the snake scale under the microscope she doesn't take it out of the bag. She turns on a monitor to view the image; the image when shown is on a different monitor (you can tell by the controls to the right of the image). The image is not a snake scale, it is a marijuana leaf from the Sharf book (his book is in the ending credits). (00:47:15)
Chosen answer: The language is Chinese Cantonese, and is saying something like "... Now we can more time.", and when the replicants came inside the lab he says "... What a f*** doing here..."