Don't malfunction yourself. What if your gun jams, or you sword breaks, or even worse, you have a complete tactical failure? The first two are are easy problems, the third is more difficult, but can be dealt with naturally. Let's consider all three in turn. If you have any firearms training at all, you already know that you should train for malfunctions. A malfunction in this case is confined to the weapon or the ammunition itself. It is a malfunction of the tool you are using. A stove-pipe, a misfeed, or the worst, a broken firing pin - are all situations that must be trained for. One common malfunction that we don't even consider as a malfunction is running out of ammo. Why is this not a malfunction? The weapon is essentially useless. We don't see it as a malfunction because this is something that we very naturally expect to happen. We train to reload. You should train for those other malfunctions just as you train...
Train smart. Live better.