Action is a way of externalizing an emotional state. You might not be running, leaping, climbing and doing all that. But, the way you create that emotional state in a movie is by having the characters have physical jeopardy that they have to work against.
James CameronThe universe is like a giant bank vault lock, where the tumblers are constantly moving and once in a while the tumblers line up and you have to listen for the click. So you must be prepared in that moment to step through the door.
James CameronWe have nightmares because our brain is running simulations to put us in jeopardy to see what we'll do or to acclimatize us to that idea that something bad could happen. It's just how human beings are wired because the entire time we were evolving we had to jump quick or the leopard would get us or whatever it was. It's Darwinian.
James CameronEvery time my cameras go out on a movie, we learn something new and then we take what we learn and we put it into the next generation of the cameras so we're constantly improving. It's kind of like building a race car, racing it, then running back to the shop and working on the engine some more and tinkering with it to improve it.
James Cameron