In chapter 6, Jem, Dill, and Scout betray their father's instructions by going to Boo Radley's house. They look into the house through one of the windows and, catching a glimpse of a man's shadow, become scared and run away. While running away, they hear a shotgun fire, and Jem loses his pants while trying to negotiate the wire fence. Later that night, Jem and Scout believe that Boo Radley will come for them in the night, and as a result they struggle to sleep. Jem decides to go back to Boo Radley's house to retrieve his pants.
My favorite part of this chapter is when the children are approaching Boo Radley's house. This is a dramatic moment, full of tension and suspense. We wonder, along with the children, what they might see when they look into the house, and the author cleverly positions the reader among the children, so that we are looking in through the window with them. We also wonder whether they will see Boo Radley, and whether, if they do, he will live up to the strange stories that we have heard about him. This suspense builds to a satisfying and thrilling climax when we, along with the children, see a shadow inside the house.
What I also really like about the chapter is that this very dramatic, tense moment in the story is followed immediately by a moment of humor. Jem loses his pants, much to Miss Stephanie's bemusement, and then Dill tells the adults that he won Jem's pants in a game of strip-poker. This is a rather ridiculous but also rather charming moment, which serves as a perfect counterpoint to the dramatic scene which precedes it.
In summary, I think that chapter 6 is one of the most memorable chapters in the story. It is dramatic, tense, and suspenseful, but it is also quite playful. Chapter 6 is also a good example of Harper Lee's writing style and of her narrative method. One reason why this book is so engaging is because the reader is so effectively positioned as one of the children. We see the story from their perspective, and this chapter certainly helps us to become familiar with and fond of that perspective.