Ineed to find quotes from "the adventures of huckleberry finn that are funny and explain what types of humor is been use, why does twain might has used it and what impact it has on the reader.

― Mark Twain, The Adventures of Huckleberry Finn
 
"That is just the way with some people. They get down on a thing when they don’t know nothing about it.” 

The funny thing is that for example and that example i'm going to use, you might also see it or experience, let's say when your talking to a friend, and were talking about a trouble someone caused you and while you were explaining it a random person who over-heard you got into the conversation to and started complaining without even knowing what or WHOM you were talking about :-/. 

Twain might have used this because that's how some people are and the impact is that sometimes before you or anyone to be exact don't jump into conclusions or interrupt someone when there talking unless they want you to speak to them.