Juxtaposition

I know its a bit late to update my blogs (because i hate blogging). So this is what I understand about juxtaposition.

Juxtaposition =

Noun	1.	juxtaposition - the act of positioning close together (or side by side); "it is the result of the juxtaposition of contrasting colors" collocation, apposition locating, positioning, emplacement, location, placement, position - the act of putting something in a certain place tessellation - the careful juxtaposition of shapes in a pattern; "a tessellation of hexagons"
	2.	juxtaposition - a side-by-side position position, place - the particular portion of space occupied by something; "he put the lamp back in its place"

taken from http://www.thefreedictionary.com/juxtaposition

So from my understanding, juxtaposition is like two random objects moving in parallel, a technique intended to stimulate creativity or putting two different things that is somewhat unrelated to create something that is creative. For example

a car is somewhat positioned towards the sky and a building

a banana or a toothpaste? or both; banana toothpaste?