UNSPECIFIED - FEBRUARY 11: Photo of James HETFIELD and Kirk HAMMETT and METALLICA; James Hetfield and Kirk Hammett performing
Pete Cronin

Fans who showed up yesterday to hear up-and-coming act, Dehaan, at Detroit's Orion Music + More Festival certainly got rewarded for trying to support new bands. 

Thousands of heads systematically exploded when, instead of a bourgeoning metal band, the crowned kings of the genre themselves—Metallica—stepped onstage.

Well, first frontman James Hetfield appeared on stage to introduce Dehaan—but he was unable to finish his speech because Kirk Hammett, Lars Ulrich and Rob Trujillo decided to rush the stage. 

Things got even better when the Los Angeles metalheads started playing their famed 1983 debut Kill 'Em All—which they tore through start to finish.

Only the most hardcore fans could have picked up on the "Dehaan" reference. Dehaan is the last name of actor Dane DeHaan who stars in the band's forthcoming 3D film "Through The Never."

Yesterday's performance came just one month before the 30th anniversary of Kill 'Em All's release in 1983. The album would go on to sell more than three million copies and counting.

Have you worked yourself into an extreme jealous rage? Good! Because we have footage from the concert below and everyone knows that full of rage is the only way to watch Metallica…