Over the weekend, Metallica played two nights in Mountain View, Calif., taking part in Neil Young's annual Bridge School Benefit. We've already posted fan-shot footage of the group covering Buffalo Springfield's "Mr. Soul" with Neil Young to finish out the first night. Now the band has posted some of their own footage from the evening, including a portion of their acoustic performance of "Enter Sandman" and a special birthday celebration for Metallica bassist Robert Trujillo.

Keeping in the tradition of the Bridge School Benefit shows, Metallica performed "unplugged" for their set. This marks their third appearance at Young's benefit show over the years, and as one of metal's most legendary acts, they've done quite well adjusting to the acoustic format. Check out their a portion of their performance of "Enter Sandman" posted below.

The band also had a little fun with birthday boy Robert Trujillo, who turned 52 on Sunday. The pies they got for the bassist weren't necessarily for eating, as many of them ended up tossed into his face. Even Neil Young got in on the fun, as can be seen below.

The group also posted their own footage of themselves performing with Young on "Mr. Soul," which can be seen below, as well as a bits of their performances of "Bleeding Me" and "Clampdown."

Metallica are currently ramping up to the release of the Hardwired ... to Self-Destruct, which is due on Nov. 18. The band just announced that the third song from the effort, titled "Atlas, Rise," will be issued on Halloween.

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