Bob Weir made a surprise appearance during Steve Earle’s show at the San Francisco Haight Street Arts Center last night. As first reported by our friends at Jambase, Earle—who is in town for an appearance at the Hardly Strictly Bluegrass Festival—was performed at the concert poster gallery as part of a benefit for the Blue Bear School Of Music. Partway through the alt-country pioneer’s acoustic offering, Weir emerged for the Earle originals “The Devil’s Right Hand” and “City Of Immigrants” as well as the Dead’s “Friend Of The Devil” and the Dead-adopted traditional “I Know You Rider.”

Renee and Irish Greg hosted the night and spoke with both guests; Earle talked about his friendship with Tom Petty and the Al Franken’s Grateful Dead fandom. Weir also discussed his new role as a UN Ambassador.

Weir will perform at his Mill Valley, CA venue Sweetwater Music Hall tomorrow as part of a benefit show tied to the premiere of Don Hardy’s documentary Fingerprints.