Some tweets had replicas of Marty McFly’s hoverboard Though one featured his actual hoverboard, signed by actor Michael J. Fox A surprising number of tweets also had pictures of dogs (though not all of them were real) Many also included the mobile scooters now being referred to as “hoverboards” Of course if you’re in space, you don’t need a hoverboard to float around What would you do with a hoverboard? Let us know by tweeting @PopSci! And check out all our coverage of Back To The Future Day here.