I'm running a game right now with lots of stupid smelly henchman that die all the time, and I think I'll use the system here for modifying morale based on PC Charisma.
At the last session, we had one of those moments... ghoul rolls a crit. The last PC drops. "Well I guess that's a TPK"
One of the PCs goes "Hey... one of the henchmen is carrying a healing potion. And he only has 3 hit points at max, so that health potion isn't gonna help him. He knows he can't get out of the dungeon without the adventurers... does he save us?"
I let the PC roll a morale check for the henchmen -- pass! He randomly chose which PC to feed it to, and a few quaffs later, the party managed to stand and fight off the last two ghouls.