In the story "Mitch and Amy" by Beverly Cleary, a character shows a strong emotional reaction. He initially responds calmly with "All right," but quickly shifts to a more intense display of feelings by raising his voice into a yell. This change emphasizes his growing frustration or anger about the situation. The character's behavior reveals his mood and the tension in the scene. When he "glowered," he looked at someone with a dark, angry expression, intensifying the emotional atmosphere. His actions suggest he's upset and possibly overwhelmed, conveying his feelings vividly to the reader.

"Glowered."