Continuity mistake: As Herman gestures to Eddie to make his point, he drops his left hand. A second later, he does it again.
Continuity mistake: The doors to the room where Herman is in the sarcophagus case are matching when the man finds them locked, but a moment later the door the man breaks through is darker colored.
Answer: The comedic gimmick of both "The Munsters" and "The Addams Family" television shows in the 1960s was that both families were convinced they were normal and everyone else they encountered was odd. The Addams Family, for example, thought their "normal" visitors were mentally unbalanced because they always fled the Addams' weird home in panic. That was a running gag throughout the entire Addams Family series, so much so that easily half of nearly every episode was devoted to the predictably terrified reactions of their visitors (always accompanied by identical canned laughter). Meanwhile, in the Munsters' universe, the family thought "normal" people were physically deformed and even quite hideous. For example, the Munsters believed that their beautiful niece, Marilyn, was socially handicapped by her ugliness (the exact opposite of the truth); and, in the episode "Just Another Pretty Face" (S2E17), when Herman Munster was temporarily transformed into a "normal" person, his entire family found him utterly repulsive. The family's hidden revulsion to "normal" people was the running gag of The Munsters.
Charles Austin Miller