Ninja Gaiden/Fridge

Fridge Horror

 * In case you haven't noticed, in the infamous continue screen for the Arcade game, just before the screen fades to red, if you pay attention you can see, as a Freeze Frame Bonus, that the circular saw has started moving. Yeah. One can only wonder what the fade-to-red stands for.

Fridge Logic

 * The recent Flip-Flop of God regarding the chronological order of the games leads to this. He beginning of the first X Box game features Ryu in traditional ninja apparel, but after Hayabusa village is attacked, he switches to his modern gear and sticks to it whenever he needs to go on a mission or save the world. Yet in the NES games and the OVA, which have been confirmed by Word of God to take place after the X Box games, he's back to wearing more traditional armor again.