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)
Revealing mistake: After Derek lifts up the carpet in the blue van after running over an alien, he punches in a code on what looks like a code entry panel to grab the chainsaw. Upon closer inspection, he's actually entering the code into a calculator.
Visible crew/equipment: When the aliens chase the gang through the forest, the gang climb into the car. The aliens then shoot at the car, and then the gang drives away. As they drive forward onto the path, you can see a big pile of equipment, bags and other objects, and a camera set up across the road. (01:08:00)
Visible crew/equipment: In a wide side shot of Derek driving the blue van thingy, you can see the front roof frame of the car reflected in the back window, which is driving along with it, filming this part of the film. (00:59:10)
Continuity mistake: When blood is splattered on Derek´s glasses from the alien hanging in the rope, he turns away and in the next scene the blood is gone. (00:15:25)
Visible crew/equipment: During the vomit-eating scene the camera pans over the staircase and the cameraman casts a shadow over the banister. (00:46:40)