John Mayer and Dave Chappelle teamed up in San Francisco for two nights at The Fillmore billed as “Controlled Danger.” The Friday and Saturday night one-offs came together only a day before, as Mayer and Chappelle merged together the worlds of entertainment with music and comedy for a very special weekend affair.

While the Internet begs to know how the “Controlled Danger” all went down, there is no video footage available as the venue maintained a strict no-phone policy. Hopefully, some day, some where, a professional concert video will come of it.

According to Mayer’s twitter, though, he covered “Passionfruit” by Drake, welcomed Grateful Dead guitarist Bob Weir for a tune, and jammed ’80’s songs alongside Chappelle for a Saturday night in the books. See the tweet below:

JamBase reports that the Dead & Company band members jammed on a version of “Friend of the Devil,” amidst Mayer’s solo acoustic portion of the night. The Search for Everything guitarist also played through originals “Who Says,” “In The Blood,” and “Neon.” After Mayer’s set, Chappelle took over the stage for some stand-up comedy that included jokes about Bob Weir’s fan-reported appearance. Mayer returned to the stage to perform alongside the comedian, eventually taking crowd-requests and leading sing-a-long versions of “Jack & Diane” by John Mellencamp, “Don’t Stop Believin’” by Journey, and more.

Earlier this month, Chappelle joined Mayer on stage at the City Arena at the Schottenstein Center in Columbus, Ohio to pay tribute to Charlie Murphy. You can watch that performance here.

Mayer will head to Europe next week for the month until he meets back up with his fellow Deadheads for Dead & Company at the end of May. See here for John Mayer’s full tour schedule, and here for Dead & Company’s.