Factual error: The crashed US spacecraft from which the monster emerges is obviously much too small to have carried a human being into space.
Monster a-Go Go (1965)
Ending / spoiler
Directed by: Bill Rebane, Herschell Gordon Lewis
Starring: George Perry, June Travis, Lois Brooks, Philip Morton
It's unclear whether the astronaut contaminated by radiation really was a menace that was walking around and killing people because the narrator mentions that the astronaut was rescued (with no memory of how he left the capsule). Was he really a radioactive "monster" on the loose? Maybe it happened, maybe it didn't, maybe it will happen. You decide...
LaForce
More mistakes in Monster a-Go Go
Narrator: What you are about to see may not even be possible, within the narrow limits of human understanding.