While in New York recently, Bon Iver‘s Justin Vernon stopped by the Jimmy Fallon studios. While there, he teamed up with The Roots for an eight-minute, improvised jam-out of Bon Iver, Bon Iver‘s “Perth”. For whatever reason, the performance never made it to TV; instead, it’s available below as a web exclusive (via Fallon’s blog):

You’re missing out, Grammys.