I had no idea this kind of thing could be done with animatronics.
From the YouTube Description:
Not CGI, but wow, what an amazing animatronic showreel by the talented Gustav Hoegen! Gustav's specialty is Animatronic Effects, Prosthetic Makeup Effects for TV and Film. His credits and some shots shown in this video include: Prometheus, Charlie and the Chocolate Factory, Clash of the Titans, The Hitchhiker's Guide to the Galaxy, Doctor Who and more.
Here is a link to Gustav Hoegen's special effects credits on IMDb.
Found via Awesome Robo!
[ Thanks Glenn! ]