You know how hard it is to swim take after take and perform the next day swimming again? Me, I'm a terrible swimmer, but most actors with that tight schedule would be sick pretty quick.

The hard part on the subway is that you have, let's say, eight hours, but you have to hit these deadlines. From here to here, you can use this part. From this time to this time, you can use that part, and you have to hit them and it gets very stressful.

These days in movies you can always come back to a location or do an insert or do something, so that's not even an issue any more. But coming back every day to the same plane, it messes with your head.

If you do any thriller or horror movie a big part of the process is accounting for the cell phone.

Obviously in the close-ups we bring extras around or we do it later, but them running in and the big shots, they don't know. They're just coming out.

Shooting digitally would not have been easier. Cameras are the same size. I always shoot on film unless I have a reason not to, which I haven't had yet.

When you make a thriller/horror, darkness is [your] friend, because it lets the imagination go wild and what not. So you always end up going into darkness.