Year: 2010
Location: Palm Beach, Fla.

Yup, Walmart again. Back in 2010, one man showed up to a Florida location prepared for the worst. Another shopper, who was convinced that the man had a gun, pointed him out to police. Authorities approached him to discover that he was armed with a .40-caliber Glock and a 30-round magazine. That's not it—the man also had two concealed knives, a "pepper grenade" and over 100 prescription pills on him. 

Christopher Scott claimed to be a retired federal agent, but was still charged for carrying a concealed firearm, carrying a prohibited weapon, and possession of a controlled substance without prescription.