Nifty trick of how to headbutt kill a guy, for those who might not know of it :) A while back I was getting 5k per CoU kill, and Xorox had been running in and out of this quest for some time so I decided to use it to my advantage. Much enjoyment!
If the guards inside that house somehow get alerted by something you do wrong or the rope hanging outside the house they start searching and find the quester inside instantly, then you can only quit to avoid death(not in this case) and reconnect right ouside the house with 0 HP/EP since you get stabbed in the belly if you quit.
I wasnt careful enough to notice the rope outside and thought i scwered it up myself so i just reconnected.
Perfect kill
I'd assume that quest if someone upsets it half way (by doing the rope thing) the man inside gets paranoid and reduces your HP to 5-10 or by way of a kind of 'forced battle emote' for you got the crap kicked out of you, so on the way out a successful headbutt is a guaranteed kill.
he hit twice!
I kinda wish I still played so I understood that but one hit kills are always cool. I got bored earlier so I took a look through your posted kills and they're cool. I don't think I did it consciously but I probably borrowed my solo style from you.