And it's no surprise that people died, because you don't know how much of this gas each person is going to inhale, what position they're going to fall in when they become unconscious and so on.
Ce n'est pas surprenant que des gens soient morts, parce qu'on ne sait jamais quelle quantité de gaz les gens vont inhaler, dans quelle position ils vont tomber quand ils s'évanouissent, etc.