The climax of To Kill a Mockingbird is when Tom Robinson is found guilty. The falling action of To Kill a Mockingbird is when Jem struggles with the judgement. Bob Ewell spits on Atticus. Jem and Atticus discuss trial process.
I think they are watching a match. They do not have enough money to buy the tickets. So, they are watching the match by climbing on their cycles, because the stadium boundary wall is very high.