Stupidity: The secret service's purpose is to protect the prince of the nation. There's a roadblock (a watermelon truck across the lane). They could and should turn the car around and/or avoid the obstacle, but what they do is instead stop the limousine and walk out, right into enemy fire, leaving open the doors. Stellar work. (00:26:30)
Squeeze Play - S4-E7
Stupidity: Hard hats are a necessity but they leave something to be desired in terms of comfort and nobody really is overly fond of them. Yet in a Hollywood clichè, the construction workers chilling at the bar outside of work wear their hats, even the one guy who is retired (and still somehow knows where the guy Magnum looks for currently is). (00:16:50)
Stupidity: Everyone refuses to believe Waldo and treats him as a complete fraud once Magnum finds out that he was discharged from the CIA a couple years before, but it's rather preposterous; the man has been a CIA agent as he mentioned, and for over 20 years. That is not like discovering that he lied about everything, and nobody would shrug off everything he says without a second thought.