There’s a definite deterring element to seeing and hearing the spark of a stun gun; something about it screams instant pain, and rightfully so. So we’re intrigued by the Sun Gun Case by Yellow Jacket. This particular one is made for the iPhone 5/5S and is 30% more powerful than the iPhone 4/4S model. This means that at the press of two buttons (for safety reasons it’s not just one) you’ll generate a spark that’s 950,000V across, and which can cause a good amount of discomfort on any would-be assailants. And when it’s not sparking electricity across two electrodes, the case doubles as, well, a case for your phone. Sure, it’s likely a little bulkier than your slimmer, non-stun-gun cases, but that’s a small price to pay to be able to carry a serious self-defense tool. It’s $149.