The idea of longtime headliner Ozzy Osbourne playing an afternoon set at a festival might have seemed odd to many fans. But it was a concept perfectly timed for him to open with "Bark at the Moon," just as yesterday's eclipse was taking place.

The performance happened at the Moonstock Festival in Carterville, Ill., and, as you can see in the video above, the sky was relatively bright when Osbourne and his band took the stage to music from Carl Orff's Carmina Burana. But less than two minutes into "Bark at the Moon," everything went dark. The fan who shot the video panned up to capture the very moment the moon blocked out the sun. The eclipse was over by the time the song ended.

The four-day Moonstock festival was specifically designed to celebrate the eclipse, with Osbourne's set being the only performance on the main stage yesterday. The Southern Illinois location was chosen because it was roughly where the eclipse would be able to be seen for the longest duration -- approximately two-and-a-half minutes. Festival attendees were given protective glasses so they could view the eclipse. Black Stone Cherry, Halestorm and Five Finger Death Punch headlined over the course of the weekend.

Osbourne has only three more dates on his calendar for 2017. He'll be at the Louder Than Life Festival in Louisville on Sept. 30 and the Monster Energy Aftershock in Sacramento on Oct. 22. He'll close out the year with Ozzfest Meets Knotfest, headlining a bill that also includes sets from Prophets of Rage, the Deftones, Rob Zombie, Marilyn Manson and Stone Sour. Osbourne has brought back guitarist Zakk Wylde for all these shows this summer. It's the first time they've played an extended run of dates together since 2006.

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