Welcome to NoSafetySmokingFirst!
For images where the text reads correctly left to right, but visual cues (like colouration, vertical proximity, or horizontal separation) lead you to try to read it top to bottom.
This is similar to, but distinct from, the more widely known “DontDeadOpenInside” format. In that case, the text reads correctly top to bottom, but visual cues (like colouration, horizontal proximity, or vertical separation) lead you to try to read it left to right.
The post that started it all:
NO | SMOKING
SAFETY | FIRST
Other related communities:
