[scenario] Your in the bath, there's a patch of cold water near your ass amoung a hot bath, does bobbing up and down in the bath move this or mix this patch of cold water? [/scenario] Also, if you remove the plug does the denser cold water leave the tub first even though the bath is moderated by one temprature, this one patch that always emminates is there, but will it be there if you take out the plug? Furthermore, isn't there some law of motion that suggests for every action there's an equal and opposite reaction? Aye, well I sneezed in the bath and the reaction was well worse than the action. It's the law.. so did I break the law, am I a motion criminal?