how to make a simple shocker circuit without using components from a camera?

 I want to make a shocker circuit whose o/p voltage will be adjustable according to my needs but it wouldn't be high enough to kill anyone i.e will give an o/p current of <=9 mA.

it is very difficult to get a high voltage from a low voltage source like a battery without using camera parts, but if what you want is a safe way to cause an electric shock take the circuit board out of a disposable camera,you can get used ones free, put a screwdriver (plastic handled) across the capacitors leads then chop the capacitor out. the wires where it attached to will produce a high voltage when the switch to fcharge is pressed.