Face on Inanimate Object Effect

I recently found a fun and easy tutorial on ae.tutsplus.com on how to add your face onto an inanimate object. Also, with the Golden Doorknobs competition coming up, I'm really thinking about possible creative ideas to put together. With this, I could give doorknobs a personality of their own and make something really unique. Just a thought.... anyways, here's the example video the tutorial provides:

The full tutorial can be seen on the ae tutsplus website:

http://ae.tutsplus.com/tutorials/vfx/put-your-face-onto-an-inanimate-object/?search_index=6

It seems like a fun trick to know in general. It also helped me understand motion tracking a little better.
Enjoy the link and good luck everyone!