i recently ran the first of the Against the Giants modules. in it, the PCs did astoundingly well until they met up with Nosnra - the PCs fled when half of them were killed, and returned to the nearby dwarven town to recuperate, resurrect, and plan. of course, it would be silly to think that the giants would just wait there for them to come back and try again, so Nosnra gathered up all the giants he could find in nearby lands and went to assault the city with siege weapons.

the PCs managed to incapacitate the cheif in the resulting battle, but their initial failure caused much death and destruction in the dwarf city - the dwarves were none too happy that their "champions" had brought the fight back to them.