Always wondered why some nails have the head on the wrong end.
My dad said they were for the other side of the house.
The ones with the heads on the top are for the floor; the ones with the heads on the bottom are for the ceiling. Everybody knows that.
Nobody has mentioned Corollas yet; nor north/south hemisphere. Could it be the left/right political bent of the airport manager.
I always remember one pain in the ar&e captain who demanded I keep it on the centreline for takeoff. I did so and we went 'dunk, bunk, thump, dunk, down the runway. I shifted it a foot off the noise and was berated. After takeoff I called, "95". He was confused and I said, "the number of centreline lights we just flattened." Perhaps I should have used the white paint, not the lights.