the row of half-naked players sway their bodies in front of the crowd then one at a time.each player bends their kneecaps , lowers the chin deeply into the chest and bows their arms pose in the shape of a completed circle , flexing their arm biceps and triceps into twin sets of smoothly curved bumps of flesh as the eight-pack abs stack like a steel chimney tower inside the bare chest then their mouth parts the sounds of a garrison of angry wild animal grunts between their pursed lips as claps , hoots , yells , and whistles invade the air waves more wildly .