A "mad scene" is a dramatic moment in opera or theater where a character experiences intense emotional turmoil, often leading to a display of madness or despair. This scene typically showcases the character's psychological breakdown through powerful music, expressive singing, and vivid staging. It serves to highlight the character's inner conflict and can evoke strong emotions in the audience. One of the most famous examples of a mad scene is found in Donizetti's opera Lucia di Lammermoor, where the character Lucia descends into madness after a series of tragic events. The scene is marked by its haunting melodies and dramatic vocal techniques, making it a pivotal moment in the opera that captures the essence of her suffering.