Concealed slingshot

A slingshot you can hide in your backpack as self defense against unsuspecting bullies. Aim your imaginary crosshairs at the back of the bullies head, fire, and reload.

Principal- What's in the backpack Dave?
Dave- Nothing. My mommy says I don't have to tell you anything, so I have nothing to tell you homeboy.
Principal- Well, you don't have to have a permit to carry a concealed slingshot, but if you have one tell me.
Dave- I got nothing to say to you homeboy.