Can't figure this out. Do the serious injuries like chest wound and arm wound stack? So if I had ganger with 2 chest wounds would he get -2 toughness? Most injuries aren't specific and the bionics confuse it because they say they only remove one serious injury. Plus what about the injuries that don't change characteristics. For example what happens if I roll 2 head wounds? Do I roll twice to see if he gets frenzy or stupid and apply both rolls? So confusing.