Continuity mistake: When the guy is in the mountains he burns some of the triffids at the fence and you can clearly see them frying. But when the camera pans across the garden later, there are still triffids, but they are all fire-free and there are no bodies.
Audio problem: After Roxy, Tom, and Robert discover Eegah's footprint, Robert can be heard saying, "Watch out for snakes!" however his mouth does not move at all. (00:10:30)
Continuity mistake: In the scene where they ride to the top of a hill on horseback, you can see a white van and power lines in the distance.
Revealing mistake: When the blonde stripper slaps the brunette slapper, for calling her "leftovers," in the closeup of the brunette being slapped, the hand is that of a male; very rough and hairy, and not the blonde stripper's.
Continuity mistake: Sakurai is having a steak dinner at home; in the close-up of the two steaks and fries, one of the men is holding a beer glass with their right hand, but it's not the case in the next shot. (00:07:40)
Continuity mistake: As Harry stands at the side of the traffic-filled back road, shots of panicked people fleeing down the two lane highway are used to convey the desperation of folks' attempts to flee the coast, except the shots used show four lanes of an eight-lane freeway.