looks like they were trying to find reinforcing
That's another reason I think it's a photoshop. I am new to structural concrete design... but typically, I don't think you would have concrete spanning much of -any- distance without at least the minimum steel required per area of slab, let alone a floor or whatever that may be.
On top of that.. who cuts that shape, really? It could happen... but come on.
Also I agree that the shadows conflict with each other.
But I agree it is a good photoshop job, very detailed, and otherwise hilarious.
... What M-Dub says about drilling 8 holes, or however would be the smartest way to make that shape... but man... why would you