You obviously can't see it, but if you are a normal, healthy human, you can feel it, that sensation of extreme discomfort, also known as pain.
분명히 모래를 못 볼 겁니다. 하지만 여러분이 건강한 정상인이라면 느낄 수 있을 거에요. 극도의 불편함, 즉 고통을 말이죠.