The Back to the Future movies might be a lot of fun, but there were some things wrong that the second movie got about the future. Released in 1989, Back to the Future Part 2 brought back Michael J. Fox and Christopher Lloyd as time travelers Marty McFly and Doc Brown, this time moving ahead to the year 2015. Upon entering their distant future in a flying DeLorean, the pair, along with Marty's girlfriend Jennifer (Elisabeth Shue), witness an airborne freeway filled with other flying cars high up above the ground.In real life, 2015 came and went, and cars are just as much on the ground now as they were in the 1980s. Perhaps a bit envious of his Back to the Future character, Lloyd took to Twitter to lament how we're still not getting around by flying through the air in our own flying cars, even seven years past when Back to the Future Part 2 predicted we'd be driving them regularly."Thought we would have flying cars by now..." he says.In response to someone commenting on the noise pollution flying automobiles would bring, Lloyd added, "Thought we would have had them long enough to find this solution."

Related: How the Back to the Future Franchise Could Continue

Doc Brown Could End Up Being Right After All

Delorean marty
Universal Pictures

Maybe we weren't in flying cars by 2015, but perhaps that's still going to end up becoming our future. Last year, it was reported that a flying car had successfully completed a test flight. The "AirCar Prototype 1" from Klein Vision is powered by a BMW engine with a fixed propellor giving it the ability to take flight. The flying car had visible wings, resembling an airplane more so than the wing-less flying cars in Back to the Future Part 2, but it's a step closer to getting to that reality.

Meanwhile, fans can go back and watch the classic Back to the Future films at anytime to imagine a world filled with flying cars. Lloyd and Fox also recently launched an all-new Back to the Future shop introducing new merchandise for fans, all part of an effort to help keep the franchise going strong so many years later.