Fall Out Boy brought out another Chicago local for their massive hometown show.
As if Fall Out Boy's hometown show at Chicago's Wrigley Field wasn't already big enough, they brought out a surprise guest mid-set.
Another hometown lad, The Academy Is...' bassist Adam Siska was invited on stage to take over bass duties from Pete Wentz during the classic Fall Out Boy closer 'Saturday', while Pete did his usual leap into the crowd.
Taking to instagram, Siska posted a photo of him playing onstage alongside Fall Out Boy guitarist Joe Trohman, with the caption "Thanks to Pete Wentz and Fall Out Boy for inviting me out to play with them at Wrigley Field tonight. Meeting those guys in 2002 absolutely changed my life, and I’m honored to have been a part of a special event like this one."