Then he strapped on a guitar and played Helter Skelter, cutting the tension with a blast of pure hedonistic energy.
Sir Paul's command of the stage is so casual that he makes it look easy. But it isn't. It's pure magic.
"It was the comeback that matched every bit of anticipation after two years of lockdown, and it brought the whole festival to tears of joy," says Glastonbury organiser Emily Eavis.