Storm over the countryside - a waterfall from the sky

I was ambushed by this impressive storm as I was out on a walk in the countryside. I made the mistake of thinking that after all the rain I'd encountered so far, I was now probably safe - and then this appeared from behind the trees I had just emerged from. It also produced quite a bit of lightning and thunder, so in the end I had to duck and stay close to the ground for safety's sake.

Done