User blog comment:Pastawriter/I need help/@comment-26475800-20150617234203

Underscore got it perfectly. I have read so many stories that have knives in them and never once was I like: "Oh god, he is using a knife again." Granted there are times when someone comes up with a really good weapon, but I doubt that if your killer, if that is what you are writing about, is killing people in a skyscraper he will have access to a lawnmower. If you are able to use something that most people haven't used, use it. On one final note, which may be helpful for your story, Alfred Hitchcock had once said that the best murder weapon is an icicle. I fell like you can figure out why.