Remember Athanasius Kircher's cat piano? The human version has been brought to reality in Quebec. From the YouTube link:
Set during the Festival d'Opéra de Québec, TFO brought opera to the people by inviting the public to engage with a new interactive and never- seen-before instrument. The Living Piano is a 12-note, giant keyboard that you play with your feet, featuring opera singers who elegantly belt out their corresponding notes as the different keys are played. From children to seniors to the occasional dog, TFO allowed the public to play with and discover opera as they moved from note to note, making music every step of the way.
No tail-poking necessary. (via the Presurfer)