It's not just big cities that suffer from traffic jams. They can even happen in more rural areas like Russia's Caucausus region — albeit with some minor differences:

This video has spread wildly since it was uploaded to YouTube. It was filmed in the Caucausus, according to Digital Journal, but little else is known about it — including the animals' motivation.

Australia's Nine Network News takes a crack at explaining the "sheep cyclone," though, coaxing this theory from a sheep breeder in New South Wales: "Sheep who've been hand-fed at some stage in their life think they're about to get fed whenever they see a vehicle. They will get used to chasing and circling moving vehicles. They have no appreciation of the danger involved."

Also on MNN:

The opinions expressed by MNN Bloggers and those providing comments are theirs alone, and do not reflect the opinions of While we have reviewed their content to make sure it complies with our Terms and Conditions, MNN is not responsible for the accuracy of any of their information.