Photo by Lucy Hamblin

It can be a little difficult to turn festival time into family time, but New Jersey's Steel Train managed to do so in their Thursday afternoon set. As they closed off with "Firecracker," from last year's Trampoline, a new band member emerged onstage: Jack Antonoff's dad, Rick, grabbed an acoustic guitar and jammed onstage with his son and bandmates. Check out the footage, and scroll down for a fan's perspective on the set:

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