This story is not one I had experienced. I had heard it from my uncle.
It was during those days when people used to go for fishing at nights, just because it would give them a good yield, probably 15 years back. You should know, during those days there were very few street lights. And it was because of the street light that the incident was possible.
My uncle, coming from a poor background, had to take up fishing during his early days. He was in a small boat with his dad which had some fishing nets. He was keeping himself very close to the land as they neared street lights (although they were placed far from each other). When he was nearing a street lamp, he found a lady dressed in white saree seating on the steps to the river. She had faced down, supporting her head on her knees. Thinking the lady was in problem, he touched her with the rowing stick. The lady got up and revealed her face. It was pale and my uncle knew what he had seen. He just moved his boat swiftly from there. When he turned he could see her glide slowly on the street as the intensity of the street lamp gradually faded into darkness...
I curiously asked him, how did they return unharmed? The answer is not the one which is frequently heard but, yes, it surely comes from experience of our ancestors. He told me that fishing net was a sacred material and would keep away negative energies. This was the reason, he explained, had kept the lady, or well the negative entity, from them and hence they were able to get back home unharmed.