The plastic bubble that envelops your torso is your only defence. It is also your only weapon. You push against your opponent, trying your best to make him leave the green mat. As you bounce off each other, neither of you can stifle the laugh that bursts forth.He takes a run at you from a distance, hoping that the impact will make you stagger enough to push you off the mat. In a moment of pure inspiration, you wait until the last second to move out of his way.