It's easy to see why someone might think it looks like a boid:
http://artfiles.art.com/images/-/Jam...C12818862.jpeg
Grey rats LOVE the birdies, so it was doing what would be expected. And what would a boa be doing up there in TN? Sure, people may have pets escape...but that's not exactly a heavily populated area, is it?
Hah, I found a picture that shows the side pattern and looks very similar to the one in the video.
http://farm1.static.flickr.com/60/22...e4963a.jpg?v=0