Well, there's a story behind that...

I fought valiantly through Anor Londo (the archers my God the archers) and then took some humanity so I could kindle the bonfire there to 10 Estus Flasks. At which point I was able to summon some help, which I assumed would be an NPC (as it was previously with the Gargoyles). What actually happened was an absolute legend turned up who showed me a shortcut and then proceeded to smash the absolute shit out of the two bosses. I helped a bit with the fat hammer one, but really all I needed to do was stay alive.

Feels a bit hollow really.