AbdulAlhazred
Legend
I think I at last see the abstraction from the perspective of the 4th Edition players.
You're just deciding when to give it that extra effort under stress, the same as your character would if under duress and desperate. Is that correct?
Exactly. What other interpretation could there possibly be really? You take some 'damage', which could be physical or luck or morale or whatever, but it hampers and drains your willingness and ability to fight. You take a few seconds, shake your head, wipe your eyes, look around at your friends fighting for their lives and you dive back in, cuts, broken ribs, exhaustion, etc put aside, for a while. Being a big hero type you can do this a few times a day and some minor magic can revitalize you a bit a few times before you hit rock bottom and then bad things happen.
Now and then bad things happen to PCs even if they're NOT totally drained of reserves. People can say it is 'ambiguous' what sort of shape you're in, but I don't think within reason that's really true. We should also look at it narratively from the standpoint of what the character knows and experiences. Characters don't really know how bad they've been hit. Every time you talk to someone who's been shot they almost always say they barely felt it or didn't know it happened, and same with other types of wounds. When you're going full tilt (and rounds are only a few seconds long) and my character suddenly finds himself sprawled on the ground he's not real likely to know if he's bleeding to death, has a concussion, has guts hanging out, broken bones, or what. He just knows if he can get up again and that he's game to try. Immediate hitpoints represents more "ability to will yourself to fight" than anything else. Sure, if your character is crushed flat he's just dead, but that's why there's a negative bloodied limit.