The mysterious Dehaan, listed on the final line of the Orion line-up, scheduled for a 4:30 p.m. side-stage slot up against the Dropkick Murphys, turned out to be a sneaky Metallica playing their landmark debut Kill 'Em All in honor of its 30th anniversary. It wasn't exactly the best-kept secret (James Hetfield's Instagram was letting people know shenanigans were afoot), but clearly wasn't the worst-kept secret either, as the crowd gathered was maybe a little bigger than Dead Sara's. People had pieced things together on the Metallica forum or just heard rumors standing in the shuttle line. "METAL UP YOUR ASS" was spraypainted over a Dehaan logo, and to many, that meant the gig was up. "If the band's gonna have Metal Up Your Ass at a Metallica Festival…" mused Jordan, 23, before the set. "That's Lars' roadie." They were still speculating until the father of departed bassist Cliff Burton walked onstage, taking a seat on the sidelines to watch Robert Trujillo play his son's bass solo on "(Anesthesia) Pulling Teeth" for the first time since Burton's passing in 1986.
James Hetfield, with a Dehaan logo pinned to his shirt, came out with a guitar strapped on: "I'm not here to introduce Dehaan. They're from Baltimore, total mystery band. No one knows anything about them but us." As Metallica launched into "Hit the Lights," the audience was too busy capturing this intimate Metallica gig on camera phones to really mosh. Proud of his little secret, Hetfield seemed the most excited, vibing with the fans up front and grinning during "The Four Horsemen": "We hope you knew, but we hope you were surprised." By the time they got to side-A closer "Whiplash," much of the fest had funneled over to their corner.
When Metallica played their festival-closing set the following night, Hetfield was still talking about the "Dehaan" set onstage. Their road-tested headlining show — similar to what was offered at the Big 4 event and Orion 2012 — still has the pyro for "One" and the big black beach balls for the closer "Seek and Destroy," giving it a note of Broadway polish. What little surprises they had — covering hometown hero Bob Seger's "Turn the Page," and digging out two alternative-era Metallica songs with "Carpe Diem Baby" and "I Disappear" — paled in comparison to the fun of Dehaan, but was nonetheless reliable, workmanlike, and full of fireworks, literal and metaphorical.