As I travel in Saudi Arabia, I noticed the sands moving and my friend said, be careful. But I became curious and continued asking what's in there that makes the sand move. When we are already inside the car, we talked about it and she said, that might be snake hidden underneath. And yes, she was right. That is the horn snake of middle east. First time, I saw a snake like that. Aside from being a snake, it has horns which made it even more horrible and scary. From that moment on, I never step onto sands of desert again.