PSU Fan Intake

Ok so obviously most if not all fans on a PSU suck air in from the case and push it out. However, what would happen if I had it pull air in from outside the case (it is bottom mounted) and had it push in? It is important to note that it is DIRECTLY beneath the Graphics card, which could in fact, help cooling if the air remains cool while traveling through the PSU?
 
Solution
Its not impossible, but its not recommended to do so. Not only would it hinder the cooling performance of the PSU, but you also risk some serious damage to the unit and yourself when you open a PSU.
Leave it as is.
In most enthusiast cases the PSU should be mounted fan down (or, in other words, intake air from outside the case).
The PSU gets its own supply of cool air from outside the case, and vents the heat out the rear. It never heats up from other components, and it never dumps heat in the case either.
Most OEM systems pull air from inside the system then vent out the back.
 


Okay but would this work in theory or would it heat up the case? (I want to flip the fan around)
 
So it is impossible to flip the fan inside the PSU?

EDIT: I really should have done an edit in the first place. Anyways, yes, I want to flip the fan, and I was wondering if the cool air would keep the PSU cool enough to not travel through the case hot?