Continuity mistake: As J pops his head up on the tall building, there are windows immediately behind on his right and left and both are closed. The camera pulls up and back to show the scale of the building, then cuts back down to J. Now suddenly the window on his right side is open, and the lamp in the room is on. The window also changes from closed to open a few times in this scene. (00:33:25)
Continuity mistake: When J falls off the green car by The Factory, cardboard boxes, a woman and a sailor magically appear out of nowhere. (01:01:40)
Continuity mistake: This movie starts in 2012 as shown on Zed's memorial, then travels back to 1969, 43 years earlier. But J tells the young K "25 years from now you're going to recruit me, and 14 years after that, the guy you didn't let me kill today..." That's only 39 years. (00:47:55)
Continuity mistake: When J lands back in time, the people behind him walking inside the building are not continuous between shots. (00:37:05)
Continuity mistake: When K grabs the remote to lift the library wall, the remote is facing a 9 o'clock direction, but in the close-up it's facing a 6-7 o'clock. (00:23:20)
Continuity mistake: When the alien cuts Boris' shackles, chains and shield, their position on the floor changes between shots. (00:03:35)
Continuity mistake: When the cops are frisking J, the small cop on the left's left hand keeps changing position in every shot, with no logic whatsoever. (00:41:00)
Continuity mistake: When K sees the dead Chinese manager pinned to the wall, the manager's facial expression and position of his head changes between shots in a mere half second. (00:15:45)
Continuity mistake: When K tells J he's suspended, J moves his right hand away, yet when the angle changes it's back in its original position and he's moving it away again. (00:19:35)
Continuity mistake: When the 60's cops stop J by the billboard sign, he pulls over by the left end of the sign. In the close-up, the car is parked right by the middle of it. (00:40:20)
Continuity mistake: When the Afro-American military man lays dead, his cap changes positions between shots. (01:33:10)
Continuity mistake: When J chases Boris in 1960s New York he exits The Factory and runs on the sidewalk past a black car and a lamppost. A frame later, the car is gone and he's running on the pavement, on the space left, to allow him to step on the green car. (01:01:30)
Continuity mistake: When J is being swallowed by the fish, the floor around him swaps from very dirty, to slightly dirty, to spotless between shots. (00:16:15)
Continuity mistake: At the 1960s HQs, K places his hand on a notebook. A shot later it has jumped next to a typewriter. (00:44:40)
Continuity mistake: When the cop is about to dip his finger in the cake, its position and distance to the cake keeps changing in every single shot, with no logic whatsoever. (00:03:00)
Continuity mistake: When J is in the car with young K, about to head for the bowling alley, the way J holds the matchbox changes between shots. (00:49:55)
Continuity mistake: When Boris shoots spikes at the door that K and J are holding, one of them gets stabbed on the upper part of the glass. When the angle changes it's stuck on the center part. (00:17:40)
Continuity mistake: At the Chinese restaurant, when K and J are eating, J's white napkin keeps moving around between shots, as do some of the saucers and cups on the table. (00:13:45)
Continuity mistake: When J drags Warhol backstage, the people they pass-by have no continuity between the front and back shots. Note the tall transvestite with bulky hair they bump into first, who, a shot later, appears several meters ahead. (00:55:45)
Continuity mistake: As soon as Boris blasts the door down, there are guards on the grounds and guards behind some of the cells in the background. After Boris blasts the the steel wall, the guards on the grounds are sucked into the vacuum of space, but the guards hiding in the cells in the background have vanished completely. They certainly weren't sucked into the vacuum of space because they were protected by both the cell bars and the ceiling above them. (00:04:50)
Chosen answer: The gold saucer crashed in middle of the street was the ship Boris stole to get to earth. While they are in the restaurant Kay gets a call that tells him a ship was taken from lunar max and it was Boris who took it.