Dot Physics: Vacuum Spider-Man
Using a vacuum cleaner to lift things. Or a person. In this case, by creating a vacuum and utilizing atmospheric pressure, while previously, I had demonstrated lift using higher pressure (i.e. the blower) to hoverboard around.
That (Bang Goes the Theory) was a great series.
Also check out the vortex cannon, for example.
http://www.youtube.com/watch?v=IyAyd4WnvhU