Hold firm to your vision but don't be a tyrant on set.

When the camera is looking back at our planet Earth, it's the tiniest of specks somewhere out there in the universe. So we do have a new sense of proportion. Of course the volcanoes and the magma under us just remind us of that.

Everything that I've done was prudent and never has anyone gotten hurt in my films - not a single actor, not a single extra, ever.

After "Jack Reacher" the parts I didn't like, most of it was silly.

You have to realize that, about 20,000 years ago, there was a cataclysmic event when an entire rock face collapsed and sealed off the cave. It's a completely preserved time capsule. You've got tracks of cave bears that look like they were left yesterday, and you've got the footprint of a boy who was probably eight years old next to the footprint of a wolf.

I'm a very professional man. I'm not out for the experience of adventure.

Of course subjects are changing, and since I started so early in filmmaking, I did my first film at age 19, of course you grow up with your films and you are not trotting the same path all the time.