Clearing a house by yourself is called "looking for a bullet". If you were trained in clearing a house you should have been told/remember that you should never try it by yourself unless it is absolutely necessary. The proper response is to immediately withdraw from the scene and summon the police. If your wife & child were inside that might be a different story. It stems from folks who have a lot of experience clearing houses and know the safest way to do it. That way involves more than one person. It also stems from common sense. Why would a person intentionally walk into a situation where there's a good chance of confronting multiple armed and hostile persons? Anyone in the world can easily get into a situation that's over his head. In order to be confident you would need to know two numbers and the first must be larger than the second. How many armed men can you guarantee that you can engage successfully (i.e. while remaining uninjured) with your HD gun? When you approached the house, how many armed men did you know were inside? The fact is you didn't know the second number and I doubt you gave any thought to the first. In other words, your confidence in this situation was not based on fact but rather on emotion.