In fact, in chemical accidents, hydrogen sulfide is known to -- if you breathe too much of it, you collapse to the ground, you appear dead, but if you were brought out into room air, you can be reanimated without harm, if they do that quickly.
화학 사고에서 누군가 혹시 황화가스를 많이 마시면 땅에 쓰러지며 마치 죽은사람처럼 되는데 그런 사람을 빨리 실내로 옮기면 신체에 별 이상없이 깨어난다고 하지요.