Today, I read 'An Occurrence at Owl Creek Bridge' by Ambrose Bierce.

How excellenty he describes can be easily understood from what this person thinks before he is hanged to death, " .....And now he became conscious of a new disturbance. Striking through the thought of his dear ones was a sound which he could neither ignore nor understand, a sharp, distinct, metallic percussion like the stroke of a blacksmith's hammer upon the anvil; it had the same ringing quality. He wondered what it was, and whether immeasurably distant or near by--it seemed both. Its recurrence was regular, but as slow as the tolling of a death knell. He awaited each stroke with impatience and--he knew not why--apprehension. The intervals of silence grew progressively longer, the delays became maddening. With their greater infrequency the sounds increased in strength and sharpness. They hurt his ear like the thrust of a knife; he feared he would shriek. What he heard was the ticking of his watch."