I just attended an intro class using Simunition FX marking rounds this morning, and all I can say is that sometimes the most stressful situation is the one where you don't shoot. If you ever get a chance to do force on force training, by all means attend! The scenarios were set up so that you don't have a run down, aside from intruder in the vicinity. No knowledge if he is armed or not, or what the intention is. Most times, the scenario ended with no shots fired, but it was never a guarantee of what was going to happen. Even while watching others go through the scenario, your heart rate goes up visualizing the situation. No visible weapon, watching hands, elevated voice and stress patterns really made me understand what the gaps are in my training and being a responsible citizen carrying concealed. It's also the closest you'll come to finding out if you'll hesitate when the moment comes. And not to take away from anyone, but it turns out, it was a lot harder for many to squeeze the trigger than we all logically know it should be. I wish I could express in words more completely what races through your head during these situations, but more now than ever, I understand the need for change in mindset.