None of the chase scenes that I did had any opticals. We had...

None of the chase scenes that I did had any opticals. We had to do all of that physically. The first thing you have to do is see it in your mind's eye. You have to envision it. Imagine someone knitting a sweater or a scarf. They either have a pattern in front of them, or they see a pattern in their mind's eye. Then it's one stitch at a time. That's what shooting a chase is like.