Kyle Gustafson / For The Washington Post via Getty Images
Jessica Goodman
August 29, 2015 AT 05:39 PM EDT

The Foo Fighters’ summer tour continued in Noblesville, Indiana on Thursday, and the band brought out another special guest — no, not Dave Grohl’s leg doctor — to celebrate. John Popper of the Blues Traveler joined the guys on stage for a harmonica-based jam fest.

Considering some of the Foo’s latest guest stars included a man celebrating his 50th birthday and a crying fan, the crowd went nuts for Popper, whose band is known for its folk-blues riffs.

Foo Fighters’ tour continues Saturday at Chicago’s Wrigley Field, and Blues Traveler will play a pair of shows in Fishers, Indiana.

Check out the performance.

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