I once got into a bar fight trying to explain this. I somehow got the idea that people who are used to write top-to-bottom might see it as flipping upside down.

I once got into a bar fight trying to explain this. I somehow got the idea that people who are used to write top-to-bottom might see it as flipping upside down. At the time I thought of Chinese letters being used that way, so while I was trying to tell about this to my friends a guy at the near table got really offended and went “you talking to me? You calling me chinese? Lets go outside!” It ended well :)