Coldplay had a concert in New Jersey on Sunday and Michael J. Fox came onstage to help them cover “Earth Angel” by The Penguins and “Johnny B. Goode” by Chuck Berry.

Of course, those are the two songs that Michael’s “Back to the Future” character Marty McFly performed at the “Under the Sea” dance.

Here’s video. Michael comes out at the 2:30 mark.