Rock band Metallica rocked a two-guitar version of the National Anthem Monday ahead of Game 4 of the Stanley Cup finals Monday night — and the Internet couldn't stop talking about it.

James Hetfield and Kirk Hammett played "The Star-Spangled Banner" on electric guitars while wearing San Jose Sharks jerseys.

Hetfield and Hammett were introduced as "Bay Area residents and long-time Sharks fans."

Their rendition brought down the house, but it didn’t help the Sharks pull out a victory — the Pittsburgh Penguins won the game, pulling ahead 3-1 in the series.

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