I have written previously about the Ouroboros, but this is the first time I have heard of people supposedly seeing them, that they could be real... I don't believe it for a moment, but you never know...

I've been getting hoop-snake stories for I guess 50 years. A reptile of this kind puts its tail in its mouth, arranges itself in a circle, and travels by rolling like a hoop at impressive speeds. All the snake books I ever read, written by experts, say no such creature exists. Yet I keep getting these hoop-snake-sighting reports, from perfectly intelligent people

Source: Houston Chronicle