Here is my hook for my short story "Bully." It is ok to post this on the blog.
Little Bradley has learned a lot from his father... perhaps too much. When he begins to show off what he has learned, he will have to suffer the consequences. Are those consequences too great, though?
You don't need a hook for a short story as far as I know. If I'm sending these things out I just give the word count, title, author, pub credits, and my reaction to it: "it scared the crap outta me"/"Killer Yapp had to revive me after I fell on the floor laughing"/"Grandmother Snark read it to her spelunking group and they all loved it" kind of thing.