Visible crew/equipment: When a gremlin attacks the Mum from a Christmas tree, and the tree falls on top of her, you can clearly see a member of the crew with eyeglasses, wearing a red shirt, standing behind the tree pushing it forward on top of her.
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Mistakes
When Pete is laying on Billy's bed talking to Gizmo, in one shot he's laying on his stomach, then in the next shot he's laying on his side. See more...
Trivia
At the beginning of the film, when Billy is late for work, you see two films playing at the movie theater: "A Boy's Life" and "Watch the Skies". The former was the original title for "E.T." and the latter was the original title for "Close Encounters of the Third Kind". Two films directed by executive producer Steven Spielberg. See more...
Gremlins mistakes
Continuity: Right after the mom sprays the Gremlin in the face with the flea and tick spray, forcing him into the microwave, we see the Gremlin cooking away in the microwave with the spray can in the foreground, its label facing the camera. In the shot where the Gremlin blows up, the can's label is no longer facing the camera, plus immediately after the Gremlin goes ka-blooie, something cracks in front of the spray can, distorting our view of it.
Continuity: When Rand is showing the old man his invention, he pulls the toothbrush up, and it is facing away from him. When the shot changes the toothbrush is now facing him.
Gremlins trivia
At the beginning of the film, when Billy is late for work, you see two films playing at the movie theater: "A Boy's Life" and "Watch the Skies". The former was the original title for "E.T." and the latter was the original title for "Close Encounters of the Third Kind". Two films directed by executive producer Steven Spielberg.
At the inventors convention, you see many cameos: Robbie the Robot, The Time Machine from the George Pal version, Steven Spielberg as the man on a motorized wheelchair, and Jerry Goldsmith (the film's composer) as a man outside the phone booth wearing a cowboy hat.
When the first nasty gremlin is scrabbling around the darkened schoolroom, at one point we see a scaly green hand reach up and grab an apple off the teacher's desk; we hear munching; and then the gremlin says something and throws the apple away. If you're not Jewish, and you saw this film with someone who is, they may have laughed, and you may not have known why. What the gremlin says is "Trayf.", which is a Yiddish word meaning "not kosher" - i.e., anything which doesn't meet Jewish dietary laws (pork, etc.).