How would you counter if you have been pinned down?

Taking down an opponent using the "shoot" is quite popular nowadays though it is a suicidal move as it exposes the attacker to fatal attack. As we don't intend to kill or maim our opponent, it is useful, and fun, to learn some basic techniques of the shoot and pin-downs, and some less drastic counters. It is also necessary to learn how to break-fall first so as not to be hurt in the practice.