And every now and then, the scenario training should bring up a bit of reality. Multiple-attacker training (the way I do it) often is done very soft - it's about building a habit of movement that helps regain some control. But if I only ever do that, people tend to get a feeling of superhuman ability dealing with multiples. So every now and then, I open up the rules a bit (keeping safeguards in place), to let people lose more often. Over time, they learn to win a bit more often even under that set of rules - and they learn not to give up when they start to feel overwhelmed (which most folks seem to do early in their training).