This uncut video Of Benedict Cumberbatch’s Smaug motion capture is awesome. It isn’t as easy as it seems to basically lie down and act evil when nothing is in front of you. Once you see him do his thing you may never look at Smaug or Benedict Cumberbatch in the same way.
Keep in mind that he is giving it his all, using his body and face masterfully. It’s hilarious, but it also shows what an amazing actor he is. There are probably only a few people in the world who could make a convincing dragon.