Article continues below advertisementMore than four decades after Back to the Future first hit theaters, a simple dinner photo between Michael J. Fox and Christopher Lloyd sent fans into a time-traveling frenzy online.Fox shared the image on Instagram showing the two longtime friends smiling at a beachside restaurant, captioning it, "Dining with my bestie at the beach. Next year BTTF is 41. Great Scott. Chris will be 88. That's some serious s**t." Lloyd chimed in with a playful nod to the film, replying with Marty McFly's famous line: "Man, that's heavy.