Sorry for my lack of information but what's a death spiral?

I really liked the idea of a -2 Dice for broken ribs and such. I made the table: 2d6 2 Minor Wounds (-1 to all rolls) 3-4 Arm (Master decides wich one - It's unusable until healed.) 5-9 Guts (Broken rib, knife stab, etc; -2 to all rolls) 10 Leg - (Master decides wich one - It's unusable until healed...

First off, it's actually pretty simple. There are plenty of anime that do this. First, the hindrances you can actually use for the various stages of health in the basic rules section. You can mimic Stunned for example by claiming there's blood in the eyes, meaning your trying to clear your vision, ...

So i'm making a game where player are no-powers Heroes. I want it Action Packed, with them jumping from buildings to buildings, or struggling to stay in a car window whle trying to kill the mobsters inside. So i have some questions wich i need help: 1 - How can i make it gritty enough? I mean, in Sa...