That is exactly what's said to have happened in this shocking video. This video, shared on Facebook by Caliber Cache, has ignited some serious debate. While this shooter is engaging targets, his left cargo shorts pocket moves. What actually happened? Well, many comments on Facebook have been on the order of a ricochet hitting his pocket, which then set off the cartridge. Other comments suggest it indeed was a detonation that could have been caused by an e-cigarette or other loose items coming into contact with the primer. See the richochet in the pocket video here.