reddwarfslash | Little help here people?

For those of you who are following the Taking Liberties series (that's the one with the Holly/Kochanski/Rimmer and the bit of Lister/Rimmer in it), I've decided to wind it up with one last fic, a Halloween story. There will be a masquerade ball and some other seasonal goodies.

What I would like input on is what costume Rimmer should wear. I'm trying to think of something that would make him reasonably unrecognisable, but not something like a gorilla suit -- I want him to be a little more recognisable than that! Holly and Kochanski will be dressing as an angel and a devil, but Rimmer's costume doesn't have to tie in with that theme.

Any ideas would be greatly appreciated!