One of the most intense moments in Leon Leyson's memoir, "The Boy on the Wooden Box," occurs when his family is forced to move into the Krakow Ghetto during the Holocaust. The harrowing scene depicts their desperate living conditions and the fear of deportation to concentration camps. The peak of intensity is reached when they stand in line for selection, unsure of their fate. Ultimately, Leon's father's plea saves their lives, showcasing the resilience and strength of those who survived.