If you’re walking home alone at night, one way to help fend off a potential attacker is to create a so-called “Wolverine claw” by placing your keys between your fingers. However, this is not the most effective form of self-defense. You see, if your attacker is close enough for you to punch them this way, you’re already out of luck, and this claw technique could hurt your own hand. A better way to travel is by keeping your keys on a longer keychain or carabiner, where you could swing all your keys at an attacker.