Sensitiveness

I broke out of all social bounds, and rushed at the door of the room which I thought to contain the incredible creature. I burst it open; the room was pitch dark. But from the front of me came a small sad yelp, and from behind me a double shriek.
"You have done it now!" cried Dr. Hagg, burying his bald brow in his hands. "You have let in a draught on him; and he is dead." - from How I Found The Superman, G. K. Chesterton