Ive come across this situation several times across multiple editions and variants of D&D: The PCs come across a dying NPC give their final words, an important element for telling the story being the NPC's death, and the party healer says "I cast heal on the guy. Now let's get all the details from him."
If the DM says the NPC is too close to death to heal, the healer PC feels crimped because nowhere in the rules does it say "you can't heal NPCs" or "a creature at death's door cannot be healed."
If the DM lets the healer revive the NPC, the DM will need to quickly adapt and either reveal more than intended so soon or come up with a way to convincingly string the PCs on further with this NPC's information. Thing is, once you do this that basically precludes any future scenario where the PCs can be present at the time of an NPC's death (well, maybe expect old age) - they'll just let the healer do their thing.
How do you handle this kind of situation in your games?
He's already "dead" in D&D terms. The DM just gave him a "last speech" ability.
Honestly, if you're gonna get all technical about NPC monologues (whether in mid-combat or at the point of death) you're not gonna achieve much in the fantasy milieu, and especially not in the D&D ruleset. It's not designed for simulation of reality, but for heroic dramatics. One has to adopt a certain supsension of disbelief at the door, otherwise we'll be criticising the physics behind Superman's flight.
