[Pekkerhead]

...it worked for me in London when I had a noisy neighbour waking me up at about 3 or 4 in the morning (loud voices on the phone, stereo blaring etc). After about 3 days (I have a short fuse) I just got out of bed and went next door in my underpants and banged on the door. I think the sight of me standing their in my kecks is enought to scare most people (don't believe me? ask the wife!!) I didn't have to make much effort to look extremely psychotic as it was 4 in the morning and I was knackered. I didn't even have to say anything as he knew immediately why I was there - He apologised profusely and was as good as gold afterwards.

I would recommend something along the same lines, but give your face a few days stubble growth and really mess up your hair so you look a bit unhinged.

If that doesn't work, try it again without the underpants... OK, I jest.

As for Spaniards. I used to live with one. They are on a different time zone. He would come home everynight around midnight and start cooking dinner. I thought he was on his own there until I went to Spain and realised that is what they do.