Pearl Jam concerts can be strange and unpredictable. Eddie Vedder might cover a song from Frozen, he might shave a fan’s head onstage — or he might drink wine from a fan’s shoe, apparently, as several thousand people discovered at Pearl Jam’s show in Stockholm on Saturday night. Reportedly, a girl in the audience asked Vedder to sign her shoe and threw her Converses onstage. After a bit of joking around, Vedder ended up signing the shoe and giving it back to her along with a bottle of wine, which she promptly finished. Vedder then declared, “OK, I’m gonna do you one better. I trust you,” opened another bottle of wine, poured it into the other shoe, and went to town on it. You can watch some fan footage of the bizarre event below.

As Youtube commenter Dustin Mirra proclaims, “It doesn’t get eddie vedder than this.”