How did the camera pass through the window (and then back out) in The Book of Eli?
During The Book of Eli (2010) there is an extended gunfight scene where the camera passed through a window, pans around, and then goes back out the window.
How was this achieved technically?
If this was a hand-held camera, how would the camera operator get through the window. If suspended, how do we not see what is suspending the camera as it pans around to look back through the window?
There's no apparent cut, so I assume it is actually a continuous scene, or possibly chromakey mixing the inside and outside scenes using the window frame to crop it?
Unfortunately due to filesize limits I couldn't upload here, so please refer to streamable for low-res clip: