In this video guide I will show you how to destroy multiple humans with a human-made explosive. Now this achievement can be tricky. You can do this on the third level, Santa Modesta. Near the mission objective where you find sleepy Ernst there will be explosive barrels nearby. What you want to do first is start killing civilians, cops, and military men to draw a big group of them. Once you have the cops and military attention, group them up together and place an explosive barrel in the middle of them. Then use the X button to set it off. If you mess up there are more explosive barrels around, or if you really need to play the level in free play.