From the lesser known sequel, Willy Wonka and the Church Organ from Hell.
Uberorgan is a self-playing (and, we're convinced, self-aware) musical machine in which several bus-sized biomorphic balloons are tuned to different octaves so that when pressurized air is blown through a reed, a specific sound is produced. The notes themselves are encoded on a 250-foot-long scroll bearing dots and dashes that translate to "traditional hymns, pop songs and improvisational tunes." The score is deciphered by the organ's "brain," which is essentially a giant, light-sensitive player piano.
But what if you're not too keen on the built-in playlist? Well, due to the light-sensitive nature of the brain, you can always stop the score at a blank space and play the organ like a piano by blocking light from reaching each sensor. That is, until the thing finally decides that it's had enough of being cramped up in a museum and bursts out in a wave of destruction across Los Angeles like some kind of otherworldly jellyfish, puffing Katy Perry tunes the entire way.