Che notte quella notte! (1977)

The story is that of a middle-aged man, socially arrived, but disappointed on a human level. He loses his head when, by chance, he becomes aware of the compromises he has bowed to, the renunciations made out of cowardice, the betrayal of youthful aspirations. His madness lasts one night then, the next day, he becomes the servile professional that everyone knows and appreciates.