I'm at the point now where I know I'm doing something right when a movie gets mixed reviews, because then I'm not in the box. I don't want to make it too easy for people and I don't want to make it too easy for myself. I want to try something unusual.

'Knowing' is one of those movies where you're going to get the spectacle, and you're going to have the entertainment in the grand science fiction tradition. But also, it will perhaps stimulate some discussion to help you sort out on your own where you might choose to go in terms of your own needs. Now, I say that without preaching.

I will promise you that if I can give you two good scenes -- which is what I always try to do in every movie -- then I feel like I'm doing my job.

In this day and age, where you have a lot of comic book movies made every day, and most of them are really good boys, it's important to have a couple bad boys out there, too.

When I started experimenting with fantasy and horror films and looking for characters who had some sort of emotional or mental difficulty, I saw opportunities to express my music - dare I say art - in a way that I could get a bit surreal.

Snakes are sometimes perceived as evil, but they are also perceived as medicine. If you look at an ambulance, there's the two snakes on the side of the ambulance. The caduceus, or the staff of Hermes, there's the two snakes going up it, which means that the venom can also be healing.

I think that 'Ghost Rider: Spirit of Vengeance' was mentally taxing, if only because I had to go to a Christmas party shortly after I had wrapped photography in Romania at two in the morning as the Ghost Rider. The invitation had a Christmas ornament on it with Ghost Rider's face on it as a tree.