"He's almost dead!" (i.e. a PC is somewhere between 0 and -something hit points)
"Quick, bind his wounds!" (i.e. what you do when you have no cleric in the party)
D&D is supposed to be deadly. Yet, rules such as "poisons do damage, rather than just kill" and "you can bind someone's wounds" and "zero hit points isn't dead, -9 or -10 is dead" make for a less deadly game. Indeed, I wonder to what extent they subtly encourage players to get overly invested in their characters. One could argue that there ought to be really deadly poisons, and really massive amounts of damage, just to counter-balance this trend. But the "escalation of power" doesn't always make for a better game.
I'm still thinking about this.