Today I make a REAL hoverboard out of dry ice! It doesn't lift you high into the air like back to the future, but it perfectly emulates the feeling! Its just a wooden board with a rim around the edge to hole 3 blocks of dry-ice in place. As the dry ice sublimates, the pressure from the expanding gas is enough greatly reduce surface friction and you can glide on any smooth surface. The wood floor in this video was far from perfect, but it did the job pretty well! I would consider this a real hov