Magic happens:

A Hoverboard (or hover board) is a levitating board used for personal transportation in the films Back to the Future Part II and Back to the Future Part III. Hoverboards resemble a skateboard without wheels. Through special effects the film-makers depicted the boards hovering above the ground. During the 1990s there were rumors, fuelled by director Robert Zemeckis,^[1] that hoverboards were in fact real, but not marketed because they were deemed too dangerous by parents' groups. These rumors have been conclusively debunked.^[1] Some companies hoping to leverage the commercial success of the movies have marketed hovercraft vehicles as hoverboards, but these products have not been shown to replicate the experience depicted in the movies. Subsequent to the movies the hoverboard concept has been reused by many authors in various forms of media in fictional universes not directly related to Back to the Future. An inventor has created a prototype, magnetic hoverboard, the first of its kind outside of fiction able to provide an experience similar to those in films, though only as a levitating skateboard; currently, as the new hoverboard is a prototype researched and developed by individuals rather than significant companies, it is limited by technological and financial constraints.