Neil Young played the latest in a half-century-long career of unexpected setlists at Farm Aid over the weekend, setting aside his own classics almost entirely — save for “Heart of Gold” and “Old Man” — to sing four covers he hadn’t performed before. In addition to a Weld-era favorite, Bob Dylan’s “Blowin’ in the Wind,” he took on “Early Morning Rain” by Gordon Lightfoot, “Since I Met You Baby” by Ivory Joe Hunter, and “Reason to Believe” by Tim Hardin. The most poignant moment, however, arrived as he approached the work of Phil Ochs. Young paused to relay folk legend Pete Seeger’s backstage regrets on Ochs’ demise and reflect on his own attempt to contact Kurt Cobain in the week before Kurt took his life nearly 20 years ago. At one point, his pre-song banter gets interrupted by someone shouting, “Come on, let’s go.” Watch each tune at the links above and see him brilliantly respond to the heckler (“I’m on my way, buddy. I work for me.”) before a great take on Ochs’ “Changes” above.