Now we learn how Gareth Edwards went out and put the Kaiju fights together - by watching real world examples.
In the latest issue of Total Film magazine, the physical aspects of the Godzilla movie are discussed.
Johnson says it was a physically demanding movie in that a lot was involved.
"I'm in helicopters. We're on trucks and trains and we're moving giant missiles," he said about playing the part of a Navy lieutenant. "Things are crashing around us. You're getting close to death. There's a lot of stuff that's made it really active."
Speaking of really active, Godzilla visual effects supervisor Jim Rygiel mentions regarding the Kaiju battles that they looked at video of animals in action, with the Kaiju fights compared to playing out as natural disasters.
"We studied real animals, though of course there's nothing that big. But it was interesting to study YouTube videos of bears fighting and komodo dragons fighting," he said.
Check out the latest issue of Total Film magazine for more.
"Godzilla" opens May 16, 2014 in 3D starring Aaron Taylor-Johnson, Ken Watanabe, Elizabeth Olsen, and Juliette Binoche, with David Strathairn and Bryan Cranston. The screenplay is by Max Borenstein, Frank Darabont, and Dave Callaham.