Games: Battlefield series, Counter-Strike Grenades are just about the most terrifying weapons of all time. Who the hell thought it would be a good idea to pack enough explosives to send your internal organs across the ocean inside a tennis ball. They might be startlingly effective at clearing out enemies that are rooted into an easy-to-defend vantage point, but even the best grenade throw can be a double-edged sword. Thanks to this insane design, self-kills with a grenade are very common on online FPS titles. From unlucky bounces to having them thrown right back, they can be more trouble than they're worth in more close-quarters maps. And woe betide you if friendly fire has been turned on...