Metal family on Instagram: ""Welcome Home (Sanitarium)" is the fourth song by Metallica from their album Master of Puppets. It was inspired by the 1975 film One Flew Over the Cuckoo's Nest. Following the general theme of powerlessness and manipulation found throughout Master of Puppets, the song depicts a mentally ill man in a mental institution. #metallicafamily #foryou #jameshetfield #thrashmetal #welcomehomesanitarium"