On Saturday night, Troy “Trombone Shorty” Andrews and Orleans Avenue brought their traveling Voodoo Threauxdown tour to the Greek Theatre in Los Angeles. The evening’s biggest highlight came when the band welcomed out a very special guest: multitalented rock and roll workhorse Dave Grohl.The current Foo Fighters frontman stepped in behind the drum kit, where he used to sit with his old band, Nirvana, and set the propulsive pace for an instrumental rendition of their Nevermind single, “In Bloom”. The collaboration reached its peak as Andrews climbed up on the drum riser with the clearly elated Grohl as the two pushed each other further, harder into the chaotic catharsis of the grunge classic.The reimagined Nirvana tribute with Trombone Shorty & Orleans Avenue was a rare occurrence for Dave Grohl. Since Nirvana frontman Kurt Cobain‘s death and the dissolution of the band in 1994, Grohl has always been reluctant to lean on the considerable nostalgia for the band he happened to play with for a handful of years as a young musician. He’s carved out an extremely illustrious career of his own, becoming one of the most notable figures in rock and roll. The “In Bloom” with Trombone Shorty marked just the second time Grohl has played Nirvana material live since Cobain’s death, with the first coming at the band’s Rock and Roll Hall of Fame induction ceremony in 2014.Grohl’s position on playing (or, more accurately, not playing) Nirvana is understandable. The music is so closely tied to the heart and mind of Cobain, the man that wrote it, that any performance without him would inevitably fall short. However, the New Orleans-style instrumental rendition allowed the immensely talented crew of musicians to honor the legacy of the material—and the impressive Dave Grohl drum work that powered it—without anyone having to bear the crushing weight of attempting to emulate Kurt Cobain.Thankfully, front-row fan-shot footage of the sit-in is already floating around the internet, so we can all witness this thrilling summit of Seattle and New Orleans music culture in all its glory. Check it out below.Trombone Shorty & Orleans Avenue w/ Dave Grohl – “In Bloom” [Instrumental][H/T Consequence of Sound]And just in case your day wasn’t already made by the video above, here’s a photo of Dave Grohl pointing at his own face on Trombone Shorty’s Nirvana t-shirt: Trombone Shorty’s Voodoo Threuaxdown tour continues on Wednesday, September 19th in Phoenix, AZ. For a full list of Trombone shorty’s upcoming dates, head to his website.