Short story about a man who could see his parallel selves in the multiverse

Does anyone know this story? It's a short story about a guy who was born with the ability to see his parallel selves in the multiverse, provided their lives are not too different from his. In one part, he (it's told in the first person) relates seeing a cat in a tree. Some of his parallel selves climbed the tree to rescue the cat, but fell and broke their necks, thus being lost to him forever. In the main story, some of his selves see a woman tied up in the back of the truck, and he decides to use his gift to rescue her. It was quite short, and part of a larger collection. Does anyone know this story, the author, or the collection it was a part of?