I still prefer this kinda revelation to "some guy made it on a computer ans stuck it on the film". At least that looks like fun.

To make this more seem like ruined childhood, Robert Zemekis once said in a behind the scenes featurette that Hoverboards were real, and that they were able to get their hands on one when they were rare. Luckily, Kirk Cameron (before he became a religious bigot) cleared the truth in a Q&A featurette.