Fear and loathing in the attic

There I was, minding my own business, in the studio, at the top of the house, out of everyone's way, playing the piano, like you do...

The door behind me opened and I heard a strange muffled gargling noise.
Out of the corner of my eye, I caught a glimpse of something that was very wrong.

I turned round and screamed blue murder. Very loudly. For about a minute.
Because I saw this:

My Sweet H has been working with a theatre company that used these costumes, and he persauded Drummer boy to come and model one for me...

And I think his head is on backwards...