How easy is it shifting from dark humour to full on horror?
I don't really think of it like that, it's just another part of the character.
I think when you play a part like this you accept that there are going to be moments of out-and-out horror and there are going to be moments of comedy and a hundred different shades of things inbetween. You just have to get on with it, play each one as if it's like eating your breakfast, really.
Are there any moments that you found really hard to take seriously?
Yes, several. Certain lines that I've had a problem saying for one reason or another. There have been certain things, the demons and some of the prosthetics where I've found myself thinking 'Oh my god, this is weird'. you know. There have been moments where I've actually been quite scared myself by the prosthetic of a certain demon or something that we're doing that's quite disturbing, and I have to ride through that.