If you need an excuse to carry around some major heat in your pocket, you should use the Gun Shaped Flash Drive.
This tool is actually useful because it protects up to 8GB of your files and information, while simultaneously intimidating people on the street. No one will want to mess with you or steal your USB when it is disguised as a life-sized hand gun. The gun has a metallic sheen to it with detailing such as screws and scoring etched into it, but it does not actually fire any rounds. The grip of the weapon pops out to reveal a hidden USB key where a magazine of bullets would normally be.
The Gun Shaped Flash Drive means business.