At first when I saw this, it looked like some one had just destroyed a NES Cartridge. Then I delved deeper into what actually went down. They actually took all the insides of the NES system and stuffed it into the Super Mario Cartridge. Apparently this is possible even with the size of the original case of the NES. Makes you wonder why they needed so much space in the older versions of the system.
I almost want to buy an old system and such just to try this out. It is a pretty cool looking case mod in my opinion.