I noticed that in other runs the knight just cuts his throat without decapitation. What interaction triggers the knight to cut off his head? I can’t find anything online about this.
I just finished my first run as hollow, however I can’t explain this.
I found this on the bad place Click Here. It gives something of a description. But doesn’t fully answer your question.
Interesting theories. Speculating in this game is very fun. The fact that they created a different cutscene and animation only for a hidden trigger, probably for a quest, probably for the hollow “path” is crazy to me.