Continuity mistake: The way that Derek's scarf is tied, and the position of it, and the way it hangs etc., changes between various shots throughout the movie. One good example is when he pulls the gun out of the stupid alien's body. (00:18:55)
Continuity mistake: When Barry is getting followed across the beach by the guy, Barry shoots him once and blood falls on to the floor, and also on to Barry's face. He shoots the guy a second time in the head, and the view is from behind as the guys head explodes. If you look at Barry during this shot, you'll see his face is clean of any blood once there, but then it returns in the next shot. (00:03:00)
Continuity mistake: In the scene where the guys are getting the weapons from the car, in the forest clearing, the ground surrounding the parked car changes through the scene. At first, it is brown dirt with branches and twigs everywhere. By the end of the scene, when they exclaim "the bastards have landed," the ground is now covered with lush green grass. (00:39:05 - 00:40:55)
Continuity mistake: The slats in the rear window of Frank's car disappear and reappear. (01:07:40)
Continuity mistake: When the guys are in the forest clearing, getting guns from the car boot and changing their clothes, Frank says "Don't you forget Oz..." and he takes his white jacket off while he is speaking. But in the following shot Frank's jacket is now back on him again, zipped all the way up. (00:40:15)
Continuity mistake: In the car on the collectors passenger seat there's a pile of collection bags, and a heavy machete resting atop. However in the shot where he pushes the handbrake down, you can see the passenger seat has nothing on it. (00:29:30 - 00:30:15)
Continuity mistake: Robert drops a machete on the collectors lap when he has his hand trapped in the window, and the collector tosses it onto the passenger seat. in the following shot where he says "bye-bye," the machete is now repositioned. (00:29:25)
Continuity mistake: When the guys are in the room eavesdropping on what the alien leader has to say, one alien holding a glass bowl walks in on them. In this shot, Frank's wolleen hat is off. Then in the shot when Frank punches the alien, it has reappeared back on his head. Cut back and it has gone again. (00:44:50)
Continuity mistake: When the chef swipes the knife, he hits another alien in the chest cutting him vertically. The cut is obviously not that long or deep, however in the next shot the alien is slashed right across his chest very deeply. (00:58:50)
Continuity mistake: In one shot as Frank is lying on his back, shooting, there are loads of leaves on the ground all around him, which suddenly disappear between shots. (00:56:35)
Continuity mistake: When Frank nearly gets chopped by an axe-wielding alien, he grabs a knife lying near the chef (who is wearing a striped shirt) but when he finally gets the knife and swinging it upwards, the chef has now suddenly vanished. (01:05:45)
Continuity mistake: During the shootout in the gardens, Frank is standing by a large green plant, which is in the middle of the gardens, with grounds, plants and paths behind it. In the next shot as he runs to the next plant, running behind the previous plant is a small wooden fence, which has suddenly appeared. (00:55:50)
Continuity mistake: In one shot as Frank is lying on his back, shooting, his socks change from yellow and black stripes, to plain blue socks. (00:56:35)
Continuity mistake: When Derek hits the alien with his blue van, splitting him in two, you can clearly see that no blood gets on the windshield. Yet in a following closeup the windshield wipers are clearing a lot of blood from it. (01:02:40)
Continuity mistake: On the cliff, Robert jumps out and grabs Derek. Robert punching Derek square in the chest is shown between two different angled shots. In the first shot, as Robert pulls his clenched fist backwards, Derek's scarf has disappeared. (00:23:00)
Continuity mistake: When the house is pulling the green sheet inwards, Frank is crawling away trying to get off it. In one shot he is crawling and there's planks and bits of wood scattered around and under him, but none in the next shot. (01:18:45)
Continuity mistake: When Robert jumps out in surprise and grabs Derek, as Derek tries to keep his balance on the cliff, there is a big brown bush behind him which wasn't there before. (00:22:55)
Continuity mistake: When the collector gets hit in the head by the chef, he falls and slides down the stairs. He slides down about five steps, but when it cuts, it's only two steps. (00:32:40)
Continuity mistake: When blood is splattered on DerekĀ“s glasses from the alien hanging in the rope, he turns away and in the next scene the blood is gone. (00:15:25)
Continuity mistake: Frank's collar alternates from up/down in the vomit eating scene. (00:47:00)