Continuity mistake: Why does the Twinkie Kevin Bacon eats disappear immediately? If things that go into him disappear, when they give the needle to the gorilla, you shouldn't see the needle point when it is stuck in her arm.
Continuity mistake: At the end of film when Elizabeth and her lover are escaping from Sebastian in the hall, Liz turned on the fire alarm and everything became wet. But after that, they, and their clothes, are dry.
Continuity mistake: When they try to make Kevin visible, they use a blue spray to see his vein (like they did to the gorilla). but you never see the blue mark again...
Continuity mistake: When Elizabeth Shue and her boyfriend are locked in the freezer, the camera keeps cutting back to the thermometer which is visibly and rapidly moving downward. However, it doesn't seem to have moved at all while the camera is not on it.
Continuity mistake: When they're pouring the "goo" on Kevin Bacon to make the mask, some of it gets on the end of his breathing tube. When they change shots, it is clean again.
Continuity mistake: When the veterinary is throwing blood to stain Sebastian, she stains her left breast. A few seconds after, there's no stain.
Continuity mistake: Sometimes you can see the outline of Kevin Bacon's head, when he is running to the toilet to puke, for example.
Continuity mistake: When the gorilla is lying on the bed, you can't see any marks on the mattress, but when they make Kevin Bacon invisible you can see his shape marked on it.
Continuity mistake: At the beginning of the film, a phone conversation tells us that it will be morning soon and Kevin Bacon will meet them at the lab first thing in the morning. Yet when they show the car driving on the highway to the lab, all of the shadows are straight down.
Continuity mistake: When Kevin Bacon's invisible character shoots another character in the chest with a dart, the dart changes position. First it is on the upper left side of the chest, then it is in the exact centre.
Continuity mistake: When they first inject Kevin Bacon with the stuff that makes him invisible, he thrashes around in pain. He lunges to his left breaking the strap holding down his right arm. In the scenes that follow his right arm is still strapped in. They even unstrap him to let him up.
Continuity mistake: In the end of the movie you can see that the doors of the elevator are almost closed. But in the next scene when Linda shoots him with the flamethrower, the doors are open again.
Continuity mistake: When Isabelle (the gorilla)'s body hair is returning, you can see Linda (Elizabeth Shue) touching it. In that shot, the leather belt above Isabelle's body actually seems to be hovering above her - it is not resting on her.
Continuity mistake: When Dr. McKay pushes open the freezer door, she is standing behind the row of wires still connected to the door. A moment later, without moving, she is on the other side of them.
Continuity mistake: When the redhead spilled the blood all over the floor to see if he was coming at her there is a little area to the left of the screen he could walk on without her seeing it. The next shot it's gone.
Continuity mistake: When Kevin Bacon gets up and the sticky sensor things rip off his body, they snap backwards and disappear into thin air.
Continuity mistake: In the scene where Linda tapes up Matt's wound, she is seen pulling a large strip of duct tape almost all the way across his stomach. Later, when they first start climbing in the elevator shaft, Matt's shirt rides up and the tape is gone.
Continuity mistake: When the team tries to make Caine invisible, he tears off all the sensors and wires from his chest. Yet the surrounding machines continue to display his heart rate and blood pressure.
Continuity mistake: When Sebastian goes to Linda's apartment to catch her and Matthew together, we see Linda welcome Matt by pulling her jeans down. Matt picks her up, hands on her bare butt. After he carries her into the bedroom, Sebastian throws a rock through the window and we see them on the bed, her jeans are pulled back up to her waist. Not the direction clothing usually goes in such situations.
Continuity mistake: When Sebastian and Linda fall on top of the elevator, both of them are clear of each other. In the next shot however, Sebastian is holding onto Linda.
Suggested correction: The serum could have been absorbed by the roots and made its way to the tip of the hair strands (similar to colored water going up a piece of celery, changing the color of the celery).
Mammal hair is not porous and is not subject to capillary action.