"Hey, McFly, you bojo! Those boards don't work on water! Unless you got power!" You can't ride this puppy, but you can pop tops with it. Open a bottle and raise a toast to the 30th anniversary of Back to the Future Part II. This heavy duty Back to the Future Pit Bull Hoverboard Bottle Opener - San Diego Comic-Con 2019 Exclusive measures about 6-inches long, is cast in zinc alloy, and features a magnet. It celebrates the Pit Bull hoverboard ridden by Griff in the classic 1989 film.