In the movies, people who get shot while wearing soft body armor fall down, but then get up after a brief period and they're good as new. In the news reports, officers who get shot while wearing body armor are usually treated for injuries, but not life threatening ones. Here's an article where a 16 year old kid was the catcher in a baseball game. A baseball hit him in the chest, but his chest was protected by a pad. The boy died. http://www.cnn.com/2010/US/12/08/new.jersey.baseball.death/index.html?iref=obinsiteFrom what I can find online, a baseball thrown at 95 mph will generate about 90 foot-pounds of energy. This puts it on the same level with a .22LR or maybe some mild .32 acp and .32 revolver rounds. The point is that even though most of the time blunt force trauma is not fatal when you're hit with a light weight object moving fast, it sometimes can be. Keep that in mind when wearing body armor. Keep that in mind also if somebody is about to punch you or strike you with something or throw a rock at you.