An alien species has released a virus upon our world that destroys the human logic center in the brain. In other words, everyone's a zombie who wants to eat you. You saw the alien ships approach and locked yourself in an airtight bunker you had installed in your basement (just in case). Three days later, the virus has died, but its effects have remained in the virus' hosts.

You're hungry. You need food and water. You emerge from your bunker to raid a nearby grocery store. Of course, you're not going to go unarmed. What weapon do you use to fight off the mutants?