Watch the power of a vacuum!!

A vacuum pump is used to withdrawal the air from a tanker car.

http://www.neatorama.com/2008/04/23/railroad-tank-implosion/

vacuums suck.

Vacuum is a very different animal, but very useful. I like how they use it on auto assembly lines to fill the fluids and get very little, if no air in anything. Very powerful.
 

Who says it was a vacuum? It could've been this girl I met at a bar once...