Continuity mistake: At the beginning when Big Bob and his family are first shown, at the gas station, their suburban has BF Goodrich all terrain tires mounted on chrome wagon wheel rims, after that first shot the tires and wheels change to Bridgestone Duelers on silver bullet hole wheels.
Continuity mistake: When Doug is walking across the desert, soon before he and Bob leave for help, he walks into shot with Brenda in the background laying back on her lounger and the bottle of lotion is lying on the ground beside her. In the next closeup the bottle of lotion is suddenly standing upright, beside her lounger. (00:23:40)
Continuity mistake: When Lynn walks into the gas station attendants room, she briefly lifts up the flap of the bag sitting on the table, and it falls back down. In the next shot of it when the attendants enters, the bag is opened wider and differently. (00:13:55)
Revealing mistake: At the start when the mutant is swinging one of the researchers with a pickaxe, as he swings him into the side of a rock face, the rock shakes. (00:01:55)
Continuity mistake: When Doug goes to rescue his baby daughter from the kidnapper's bed, he creeps past the living room to see a bald matron watching TV and combing a wig. Then after he grabs his baby, and creeps past the living room, the bald matron is still sitting and combing the wig. But 5-seconds later, when he gets a few feet down the same hallway, that matron suddenly appears out of nowhere and attacks him.
Continuity mistake: In the shot where Doug's fingers are cut off, the severed finger that remains on the floor is covered in blood, but next shot of him pulling his hand away shows almost no blood on the severed finger.
Continuity mistake: The scene where the father has gone back to the gas station to look for help, he purchases a bottle of water and pays for it. He takes a sip and walks into the back. He puts the bottle down on the table, and the bottle is now half empty.
Continuity mistake: In the scene where Doug is standing by the generator and finds his baby, he hides from Cyst against the house's wall as Cyst passes, dragging a corpse. After Cyst passes, Beast whines which makes Cyst turn. In that split-second, Doug and Beast manage to get inside the rusty car a couple of feet away.
Factual error: There are numerous rusty warning signs around the test sites from the Department of Energy. The DOE wasn't created until 1977 but the tests occurred from 1945 to 1962. They should have read Atomic Energy Commission (AEC). (00:06:40)
Continuity mistake: Bobby's boxer shorts go from blue in the beginning of the movie to black towards the end.
Answer: Pluto puts his hand over Brenda's mouth and Ethel doesn't bother to look over.