another kind of horizon line

imagine:

people lining the walls of a small, square (or rectangular) room. they stand shoulder to shoulder, with their backs pushed up against the walls. each person has their shirt lifted so you can see their belly, and a straight black line has been drawn across their midsection at their bellybutton. some people are standing on small wooden blocks in order for all the lines to intersect at the same height from person to person (since our bellybuttons are at different heights, and some people are taller or shorter than others). the continuous black line forms a horizontal band around the room ... a horizon line, of sorts.