Tomorrow night, Pearl Jam will headline a night of Tennessee’s massive Bonnaroo Festival. But before playing that show, they played a very different sort of show last night. The band made a visit to Jack White’s Third Man headquarters in Nashville, playing a short secret show at White’s Blue Room and recording the whole thing direct-to-acetate. And as part of the band’s eight-song set, White himself joined in on guitar for one song, helping out on the non-album track “Of The Earth.” No video of the performance has materialized online yet, but you can see some Instagrams from the show below, via Pitchfork.

Excited people excitedly entering the #thirdmanrecords patio… Whatever could they be so excited about?!

A video posted by Third Man Records (@thirdmanrecordsofficial) on Jun 9, 2016 at 4:23pm PDT

…and after the show? It’s the afterparty! #cake #pearljam #thirdmanrecords

A photo posted by Third Man Records (@thirdmanrecordsofficial) on Jun 9, 2016 at 6:52pm PDT

Welcome to the family, @PearlJam! #thirdmanrecords #pearljam #eddievedder #margoprice

A photo posted by Third Man Records (@thirdmanrecordsofficial) on Jun 9, 2016 at 7:43pm PDT

Direct-to-acetate. #ThirdManRecords pic.twitter.com/UbKgEGQONl

— Pearl Jam (@PearlJam) June 10, 2016