Best action TV revealing mistakes of 1992

1

X-Men (1992)

X-Men picture
X-Men mistake picture

The Cure - S1-E9

Revealing mistake: When Rogue puts the dome in place, if you look closely you will see that the dome is resting on thin air (note that you can see the sky through the platform she sets it on, and when she sets it down, the underside of the dome is visible).

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Batman: The Animated Series picture

Heart of Ice - S1-E3

Revealing mistake: When Batman - disguised as a security guard - opens his utility belt, the belt opens and shows a configuration of buttons and a split-second later, a key card materializes out of thin air in front of the buttons.

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