clever and high marks.. but if your goal was realism you have to work on the shadow/shading.. but the overall effectis very effective... I could see this as a great wall poster.. good luck

we gonna need a lot of those then XD O.o great imagination but like golem said shadows are missing

Unfortunately it is the habit of people new to photoshop to use drop shadow for all of their shadow needs. This is rarely the solution such as in this case. When you use drop shadow and let the shadow ring your subject, it no longer appears to be in the scene, but rather in front of a photo of the scene. If you must use drop shadow, experiment with the angle of the shadow so that it comes out only at the bottom. Otherwise, make a shadow out of a duplication of the object, or use a soft brush to make your shadow.

the car looks like it's floating around...loose the drop shadows...