Sargent Major Morris throws the Monkey's Paw into the fire, and Mr. White tries to retrieve it. Not only does their further characterize Mr. White by revealing his impulsive nature, it also allows the rest of the story to progress by putting the Monkey's Paw in the White's possession.
A man from Mr. and Mrs. White's son Herbert's job came to tell them the news that their son had died; and gave them a conpensation amount of 200 pounds. This is important because of the way it affects Mr. and Mrs. White.
Mrs. White attends to the knocking door assuming it is her son, and struggles to open the door to let him in; however, just before this their son had arisen from the dead, and Mr. White knows that it is likely that his son still appears torn apart despite being alive. This raises suspense, and allows Mr. White to have the chance to wish away his maimed son so that his wife wouldn't see it.