"I won't give you the last zombie virus vaccine" he yelled

You stood opposite each other and pointed your guns at each other, you knew you had no bullets left but you didn't let it show

"What you gonna do now? Kill me?" He asked with a serious voice "Why don't you just pull the trigger?" You couldn't decide what to do

"What? Something's wrong little one?" Smiles "You don't have bullets, do you?" Sighs and takes out his knife "Sorry, i have to kill you"