A few months before 9/11, I was in an airplane. We were prepping for flight. I was in the emergency exit aisle on the right side. The captain came on the overheads and welcomed us to the flight. I wasn't used to that during pre-flight. But, he said we'd be getting underway in a few. About two minutes later, we suddenly heard over the overheads as the stewardess raced to the front a mechanical voice saying "WARNING, WARNING. Fire, Right Engine. WARNING, WARN...". About 15-20 seconds later with all of us madly scrambling to see what was going on outside my window, the captain came back on the overheads. "Whoops. Sorry folks. Wrong button."
It was not a good flight.
Speaking of "Whoops."
Reminds me of an old Air Force safety training film from back in the 60's.
A B-52 was on taxi.
The Copilot was in a sour gloomy mood (hints at family problems,) so was not paying full attention to his duties.
The Captain said to him, "Cheer Up."
The Copilot said, "Roger, gear up," and proceeded to bring the gear up.
That's not a real good policy during taxi. The damage to the B-52 cost several thousand dollars, but luckily no one was hurt.