That'll Do It
In order to treat patients who had lost the ability to focus their attention, German physician Johann Christian Reil (1759-1813) proposed a "Katzenklavier" whose keys would drive nails into the tails of cats, who would yowl on key. This, he reasoned, would capture anyone's attention.
The American postmodernist composer Charlie Dees actually published two concerti for Katzenklavier in 2004. Thankfully, they remain unperformed.
