WOW! This discussion has gotten pretty intense. As others have said I think it all depends on the situation, and perception of the situation to responding officers, the DA, the judge and the jury. I think probably the best option is to use your Miranda rights until your attorney is present. Don't volunteer any information to anyone, and don't speak to anyone until your attorney is present. There are very few clear disproportionate responses. Using a sledghammer to drive a finish nail, a shotgun to kill a fly are a couple of examples. Unfortunately, you may not always have time to properly asess a self defense situation. That is a fact that you should definately exploit if you find yourself in that predicament. You have to react with the best information you have available at the given time.