Cucuruz Doan's Island - S1-E15
Stupidity: Amuro came to the island to respond to an SOS. He finds the pilots, tries to tend to their wounds, they die. He then meets a Zaku pilot that orders him to surrender. Amuro manages to jump on the Core Fighter, take off and then...tries a desperate and very hard maneuver to fight the Zaku, when at that point he simply needed to fly back to White Base; the Zaku could have never followed him. He has nothing at stake, no need at all to fight. And the Zaku pilot even told him that he did not want to fight to begin with. (00:08:00)
Stupidity: Dr. Greg seems to catch some of the more obvious quirks of inmates attempting to take a large vial or bottle from the cabinet. Yet he doesn't seem to notice when Lizzie grabs a bottle of pills and pockets them from the rolling cart in front of him. (00:20:15 - 00:20:45)