Dave Grohl doesn’t often play Nirvana songs; in fact, the band’s induction into the Rock and Roll Hall of Fame in 2014 marked the first time Grohl had done so since Kurt Cobain’s death 20 years earlier. However, over the weekend, the former Nirvana drummer joined New Orleans jazz collective Trombone Shorty & Orleans Avenueto play Nirvana’s Nevermind classic “In Bloom”. The surprise performance took place during Trombone Shorty’s gig at Los Angeles’ Voodoo Threauxdown Festival,