The Katzenklavier, or cat piano. Plingsby should LOVE this one. Athanasius Kircher, a 17th-century German Jesuit scholar, documented some fantastical devices including the Katzenklavier ("cat piano"). It has a normal keyboard in front of a line of cages, each of which has a cat trapped inside. When a key is pressed, a nail is driven into the tail of one unfortunate feline, which naturally screeches.