Best movie stupidity of 1969

Stupidity: The ship crashes at the end after the reverse polarity from the shuttle causes an explosion. This could have been avoided by a) doing a spacewalk with a multimeter and checking the connections or b) not connecting the shuttle to the mothership. And it is hard to believe that there were no circuit breakers or fuses that would blow and protect the ship.

Stupidity: Warrant Officer Warrick yells at Section Officer Harvey to put out her cigarette because the gas mains have gone. He ignores the fact that there are fires raging everywhere, which would be much more likely to ignite the gas than a single cigarette.

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