I've had this idea since Battlefield 3. What if were possible to become disabled as infantry if our health drops below say 25%, or 10%, or whatever? When we're disabled we walk and run slower, but if we run it's a bit harder to control direction and you lose health faster, you bleed out. The only way to recover from this is with a med kit from a Medic.
Thoughts? Or does it change the game too much?