It reminds me of the thread snake from Nature: Snakes. I watched it online on Netflix last night, it is the 2nd part in a 3 part series on reptiles. The first part is alligators & crocodiles, the second part is snakes, and the third is lizards. Each part is about 50 min long.
I recommend them, they are pretty well-done.
Sorry if that is off-topic :awcrap: