Here's an cool experiment you can try at home if you've got two fans and a piece of paper. Face the two fan towards each other and turn them on. Then fold a paper plane and stick it between the two fans. Result? Hovering plane!

See nine more science tricks from youtube.

I’ve always wanted to do this. Never really got the chance to go up a tall enough building to do it. But if I were to do it I totally would not fold that type of paper plane. Those suck!