An animated version of the bear attack was created to plan out motions.
"We looked at some of the beats, the way the polar bear in the previews that we've got, how it swats the guy away, how it picks someone up and shakes him around, and then we get our wires in and start rehearsing with guys using different methods to pull some around and get me the right body shapes and the right energy," said Richard Bradshaw, the assistant stunt coordinator.