Sometimes they make me run. Which I was outraged because I thought, you know, playing The Flash, this will be great, you can't see him running so this will be easy! No, no, Ezra, we need you to run. We have this enormous treadmill that's called, I think, The Tumblelator, that's like 25 feet long, goes 45 miles per hour and its bouncy, like a trampoline. Pretty much a dream come true. Then, they strap me into a harness, we do all sorts of stuff. What we're creating is a vocabulary; where choreography meets visual effects. And what we're trying to implement is a wide diversity of tactics of how we create these moments and... A lot of The Flash is his perception.