Paul McCartney brought out Ronnie Wood to play "Get Back" in London.

The Rolling Stones guitarist Ronnie Wood made an unexpected appearance in London on Monday – onstage at a Paul McCartney show. McCartney surprised the audience at the O2 Arena when he invited Wood onstage to join him in playing The Beatles’ “Get Back.”

Pure magic at the start of the video here when people realize what’s going on. I love the totally matter-of-fact “That’s amazing!” and the way the woman filming rotates the camera for a way-too-close reaction shot of pure unadulterated excitement (before realizing she should probably keep her camera pointed toward the stage). Golden.