Why did the knocking stop so suddenly in The Monkey's Paw?

In "The Monkey's Paw," the knocking stops suddenly as Herbert, who had died earlier, is revealed to be the source of the sound. The tension builds as Mr. White realizes that the knocking is not just a figment of their imagination but a horrifying consequence of using the cursed paw. The abrupt cessation of the knocking signifies the culmination of the family's dread and the tragic consequences of their wish, highlighting the story's themes of fate and the dangers of tampering with destiny.