WHAT AM I

How Are You Today :

What am I ?

I have a head, but I don't have eyes or ears. I foam at the mouth, but I roar, but I never bite. I roar, but I have no tongue. I lie in a bed, but I have no back. I rise , I fall, I rush and run, but I have neither legs nor feet. I was born in the mountains, but I go down to the Ocean whenever I can. I cannot keep still for a moment. I am as restless as can be.
What am I>>>>ha..ha..ha???????