...No, that's not a joke set-up. It really happened on the Santa Monica Pier in 2010. Daniel Corral and his group the Free Reed Conspiracy actually sat on carousel horses that went up 'n' down, up 'n' down, playing a near-30 minute powerful drone piece - like Glenn Branca for squeezeboxes. "...the audience listened as the music spun past them." Watch it here (can't see the musicians much, unfortunately):
or download the mp3 from Corral's website if you scroll down a bit
tho it's not as densely loud. The acoustics of the 80-year-old carousel building no doubt caused much reverberation, which I prefer to the pristine studio version.
There was apparently an entire evening of music and performance on the carousel and, as I live in Los Angeles, am bummed that I wasn't there. Encore, encore!