John Mayer played San Francisco’s brand new Chase Center last night and brought along a few pals to help him in his second set. His fellow Dead & Company buddy Bob Weir came out and joined Mayer for “Queen of California” and then Sammy Hagar came out and joined the lot of them for the Grateful Dead classic “Fire on the Mountain”.

Check out videos of the sit-in below.

Scroll down for the full setlist from the show, too.

John Mayer, Bob Weir, Sammy Hagar, "Queen of California" & "Fire on the Mountain" – Sept. 16, 2019

John Mayer, Bob Weir and Sammy Hager Queen of California – Fire of the Mountain