::::Exactly, Fox, thanks. When I step in a puddle of water, it moves more in response to the force than if I step on a sidewalk. If it doesn't, I need to lose some '''serious''' weight! <grin> [[User:Boomcoach|Boomcoach]] 13:04, 23 February 2008 (EST)
:::: Here is a [http://science.howstuffworks.com/question72.htm nice succinct explanation].[[User:Boomcoach|Boomcoach]] 13:10, 23 February 2008 (EST)