In chapter 5 of "The Stranger",  the outcome of Meursault's trial is the death penalty. Towards the end of this chapter, a priest comes to visit him and Meursault's reaction was blasphemy in the eyes of the priest. As the priest tried to explain how his sin can be forgiven, Meursault screamed into the priests face. In this scene, I think Meursault had finally let out all of his mixed emotions out from all the years he's lived. He was always the type to hold everything in and not share his feelings on anything in general. But now that he accepts his death and knows this is his last moments to tell someone how he feels, he screams away his pain and joy.