Continuity mistake: At the beginning of the movie, when Serleena first lands on Earth, her ship crashes into the ground and creates a mound of dirt. When Harvey the dog comes over to check it out, the mound is gone. (00:04:43)
Continuity mistake: Before the alien transforms into a woman it flips the pages of magazine located inches away. When the alien starts to transform the magazine disappears. (00:05:10)
Continuity mistake: When Jay is trying to tranquilize Jeff he gets hit in the head by a crossbeam which lays him back on Jeff's back. You can see that the syringe is not in his hands or his mouth, but when he sits back up he has it in his mouth again. (00:08:25)
Continuity mistake: When Jay and Tee are at the diner eating pie, when Tee starts to eat his pie a woman with a purple shirt and black skirt walks by. When Tee Starts to cry, a few seconds later, there is a shot of Jay and the same lady walks by again. (00:12:45)
Continuity mistake: When Agent Jay and Tee are talking in the diner, a young guy passes behind Jay towards Tee, but disappears when the angle changes. (00:13:10)
Continuity mistake: The entrance room (the large stone building off Battery Avenue) to the starport reverses between the two movies. In the first movie, the guard sits on the right hand wall as one faces the elevator, with a fan visible through a grille behind him, and a circular vent on the other wall. In MiB II, he is sitting against the left hand wall, but the fan and grille is still behind him, meaning it has changed walls. (00:17:15)
Continuity mistake: When Frank the dog is growling at the agent in the park his teeth are fine but later talking to Zed he is told he can have better dental. He smiles and his teeth are horrible. (00:23:50 - 00:31:10)
Continuity mistake: When Agent J drives to see the small, gold alien ship in the yellow tent, he steps out of his car and into a small amount of mud. His shoes already have mud around the soles and edges when he steps out. (00:24:30)
Continuity mistake: When Jay is giving Kay his favorite gun "little cricket" he is seen holding it by the lower part of the handle. The camera angle changes and he's holding it differently. The camera angle changes again and he back to holding it by the lower part of the handle. (00:31:45)
Continuity mistake: When J and Kevin get flushed they end up in 2 cans in times square. In the long shots the cans are the same height, but in close ups, Kevin's is slightly shorter than J's. (00:35:30)
Continuity mistake: After being flushed, the amount of water on J's chin increases in the close-ups, but decreases in the wide angles. (00:35:35)
Continuity mistake: When Jay and Kay make their visit to Jeebs, Jay is talking to Jeebs and you see Jeebs making a statement about how his business is 'banging' and when he see Kay walk in, he points both his hands at him. The camera angle changes and Jeebes is now seen with only one hand pointing at Kay. (00:36:15)
Continuity mistake: In the scene where Agent Jay is looking at MIB HQ and sees the dead alien with tentacles, he sees something (Frank). He tells the computer to zoom in and when it does the tentacle on the right hand side half way up the screen changes shape and position. (00:36:40)
Continuity mistake: When Jeebs is about to start the deneuralizer, watch the left part of the chain around the computer screen; Sometimes a tip of the screen is visible, others not. This changes back and forth. (00:40:10)
Continuity mistake: After Jay and Kay go to see Jeebs about the deneuralizer, Kay leaves and the bad aliens come crashing through the walls. Jay shoots Jeebs head off and, as it's growing back, he says he got shot "right in the pie-hole" (mouth). However he was facing away from Jay when he was shot and it was above the mouth area. (00:40:25)
Continuity mistake: When Kay shoots Jeebs' head off, him and Jay are shoulder to shoulder looking down at Kay. Jeebs' head acts like a popped balloon full of green goo, but none of it gets on Jay or his suit. (00:41:20)
Continuity mistake: At Jeebs' basement, when Scrad comes to talk to J, J's tie swaps back and forth between tight and loose. (00:42:25)
Continuity mistake: At Jeebs' basement, an alien lifts up J, placing his hand on Jay's right shoulder. When the angle changes, the hand is on the left shoulder. (00:43:00)
Continuity mistake: At Jeebs' basement, an alien launches J away and he lands facing to the left. A frame later his head is facing to the right. Also, his arms have changed positions. (00:43:00)
Continuity mistake: Right after Zed kicks Serleena in the face a few times, you see Serleena tripping him with the vines from her fingers and he lands on his side. The camera angle changes and he is now seen laying flat on his back. (00:44:40)
Answer: They are extraterrestrials, the fact they are weird gives it away to K now he has been deneuralized. He started to notice them again as his mind is rebooting.
lionhead