I always find it odd that the government spends billions of dollars to teach police the concept of "reasonable force" yet normal citizens are expected to have a full grasp of that concept without any training or discussion of the law. If trained government officials can't always meet that standard of training then how does that same government expect normal citizens to meet that high standard? Clearly the concept of "reasonable force" is not common sense or else it wouldn't cost tax payers so much to teach it.