Place this clip right after the visual with the kilometer figure, then follow it with the bruh sound for a deadpan beat before cutting back to your main footage or reaction.
このサウンドについて
A five-second spoken clip of a voice shouting the line What the heck is a kilometer, loud and confused. It feels funny and proudly overconfident, turning simple bafflement at a metric unit into an exaggerated patriotic reaction that listeners instantly get.