Factual errors: Plutonium was used in the first A-bomb in 1945, not for the first time in the '50s.
Continuity: When the Sgt. brings Manning his dinner in the tent and Manning takes the platter from him the Sgt. is seen looking at a newspaper but in the next scene he is seen taking the paper out of his pocket and unfolding it.
Continuity: When the Colossal Man is rampaging along the strip, four cops standing by two police cars fire at him but when the giant tears the cowboy from atop the Pioneer Club and throws it at them, the cars are gone and there is a crowd of people around the cops.
Continuity: When Manning is on Boulder Dam he puts Carrol down on the north end but after he falls she is on the south end.