Point taken I hadnt considered that distinction thoroughly It is plausible that a lethal stun gun could be constructed from a very large capacitor charged by a highvoltage DC source However the flash units in the disposable cameras used are much the same as nondisposable cameras battery to provide source power at low voltage circuitry to boost the voltage capacitor limited physical size to store the energy for quick release and strobe to create the light Cameras powered by  V CRA used to be common before rechargeables took over and there is at least one commercial stun gun powered by the same combination I would expect the instantaneous power between the homemade device and the commercial stun gun to be comparable Interestingly enough I couldnt find a source verifying that the Maine incident occurred