Take it with a grain of salt...
When I was eight years old I moved to Japan and lived there for several years. The first time I saw sumo wrestling was at some warehouse where a bunch of Japanese guys worked, and at lunch time, they would do sumo wrestling. I had never seen it, didn’t have any idea what it was, and saw two big fat guys facing off and throwing salt in the ring (I didn’t know it was salt, I thought they were just throwing handfuls of dirt...it was very puzzling)
And when they started doing the posturing like the picture shows, it was utterly befuddling. I had no idea it was a sport.