Art of killing

A old country woman crossing a downtown street. The moment she put her foots on the rail a streetcar come rushing down the track toward her. If the old woman does not notice the car and continue crossing the track nothing will happen. Aware of that, he shouted "look out, old woman!" The old woman suddenly become flustered and would pause to decide whether to go on or to step back. The streetcar could not apply his brake in time, and the mere words become a dangerous weapon. He successfully killed the old country woman. Each time he think of a new ways of killing filled his heart with an unholy pleasure. His only interest was only in the art of killing and nothing else.