Michael J. Fox Re-enacts Classic 'Back to the Future' Scene

11/14/2011 6:20 AM PST BY TMZ STAFF

In what has to be the coolest video ever, Michael J. Fox took the stage at his own charity event this weekend and played guitar for "Johnny B. Goode" ... just like he did in "Back to the Future."

"I guess you guys aren't ready for that yet. But your kids are gonna love it."