Metallica played the second of their two 40th anniversary concerts at The Chase Center, in their hometown of San Francisco last night (Sunday, December 18). Right before the band was to start playing, the fire alarm went off in the arena and people started heading for the exits, but everything was back to normal in a few moments. On this night the band played several deep cuts and songs they have not performed in many years, some since their 30th anniversary shows in 2011. Watch fan-filmed footage of the show!