When you tell a joke, the joke won't be funny until the very last word. The power in the sentence comes when the best word is last. If you say the punchline in the wrong order, the joke doesn't work.  At all.

In the middle of Mrs. Ravenbach's Way, Mr. Wilcox is worried about money.  He asks his wife...

“Do you have any idea how much this is going to cost?”

Mrs. Wilcox said, “We could take in boarders. My mother has alway--”

“Not a snowball’s chance. Don’t ever forget, when your dad got cancer, he was happy.”

In the last sentence, I moved the words around so the most important word was at the end of the sentence. That little change gave the sentence more power...

“Do you have any idea how much this is going to cost?”

Mrs. Wilcox said, “We could take in boarders. My mother has alway--”

“Not a snowball’s chance. Don’t ever forget, your dad was happy when he got cancer.”

Listen to jokes. When you read, pay attention.  Often the most important word in the sentence is at the end. And the most important sentence is at the end of the paragraph.

Best Word Last