Neil Young is hosting his annual Bridge School Benefit in Mountain View, CA, this weekend, and last night’s kickoff featured the host guesting with multiple artists, including a My Morning Jacket-backed Roger Waters and metal legends Metallica.

Waters, who reprised his lineup from last year’s Newport Folk Festival, which featured a backing band of My Morning Jacket, guitarist G.E. Smith and Lucius’ Jess Wolfe and Holly Laessig, played a set that included Pink Floyd tunes like “Wish You Were Here” and “Mother” before welcoming Young out for a singalong closer of Bob Dylan’s “Forever Young.”

Metallica’s set, which, as Rolling Stone reports, featured their first-ever live cover of The Clash’s “Clampdown,” also included a Young sit in. The host came up with the band for a cover of Buffalo Springfield’s “Mr. Soul,” with Young taking lead on vocals and battling with guitarist Kirk Hammett in the middle of the tune.

Watch highlights from the night above and below. The Bridge School Benefit continues tonight in Mountain View.