Tony Vargas
Legend
Depending on how often players actually entered the -1 to -10 range vs just dying outright due to taking more than -10 of their hp in damage I might could go with this system. It's close but sometimes yields a not instant death state which I'm not against
Another occasional variation on that is negative CON score or negative 1st level HD...
...hm... actually, maybe you could use HD when dropped? Maybe, at 0, roll one HD, you have that many rounds to live?