I once ended up in the smoking section by accident. The smoking section was almost always in the back of the plane and I was in the habbit of requesting a seat

I once ended up in the smoking section by accident. The smoking section was almost always in the back of the plane and I was in the habbit of requesting a seat "as close to the front of the plane as possible." But once time the smoking section was in the front, and I didn't realize this until the no-smoking sign went off and everyone around me lit up. It was a nightmare. Happily, there were empty seats in the back and I was able to move. Thank God, because it was a trans-Atlantic flight.