It can fly up, down, forwards, backwards, even upside-down. And so if we wanted to fly in this room or places where humans can't go, we'd need an aircraft small enough and maneuverable enough to do so.
上にも下にも 前にも後ろにも飛べ 上下逆さになっても飛べます 屋内や人の入れない場所に 行かせたいなら 十分に小さく 運動性の高い飛行機が 必要になります