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.
事实上，在化学事故中， 硫化氢是很出名的—— 如果你吸入太多，会瞬间倒地， 看上去就像是死了， 但是如果马上把你带到正常的空气中，你仍可以醒来，而且毫发无损， 前提是救援要快。