Faerie’s Aire and Death Waltz, by composer John Stump, includes the directions “Add bicycle,” “Duck,” and “Cool timpani with small fan.” The piece fills a single page.

To perform Stockhausen’s Helikopter-Streichquartett you’ll need four helicopters and a string quartet. A moderator introduces the musicians, each of whom boards a helicopter, and the four perform the piece while circling the auditorium at a distance of 6 kilometers. The audience watches and listens via audio and video monitors. At the end, the helicopters land and the musicians re-enter the hall to the sound of slowing rotor blades.

Marc-André Hamelin composed Circus Galop for player piano — it’s impossible for a human to play, as up to 21 notes are struck simultaneously.