Bob Weir and Mickey Hart sat in with former Van Halen singer Sammy Hagar Saturday night during a holiday benefit held at Mill Valley, CA’s 142 Throckmorton Theatre. The Grateful Dead members emerged during Sammy Hagar & the Wabos’ set for five songs, including Bob Dylan’s “Rainy Day Women #12 & 35” and The Band’s “The Weight.” Weir is a regular guest at Hagar’s annual charity event.

Hagar has also sat in with Weir’s projects a few times over the years, including The Dead’s first performance in 2003. Saturday’s show marked the first known time Weir and Hart have collaborated onstage since the summer of 2009.