The Flaming Lips are certainly unconventional and experimental. One of their weird projects was a to release a very, very long song called “7 skies H3” which, in its original form, ran for 24 hours. It consisted of a several separate pieces, each running anywhere from 25 minutes to seven hours.
If that wasn’t enough, just 13 copies were released on flash drives that were encased in actual human skulls. They went on the market (appropriately) on Halloween 2011 and cost $5,000. And yes, they sold them all.
If you can’t find your own copy—imagine that—they also set up a website with the song on a continuous loop. And if you would rather have a physical copy, there is a edited version that runs 50 minutes that was released for Record Store Day 2014.