All it takes is one painful thought. With a deep, sharp breath, I tightly clench my abdomen. Sharp, radiating pain floods my solar plexus. Breathe out, and the pain is everywhere. Entire muscle groups pop and spasm, pupils dilate, and veins bulge unnervingly. Breathe in, and… euphoria. The surge of adrenaline coursing through my blood makes it impossible not to feel superhuman. I rush headlong into battle, a tight squeeze around my chest not so gently reminding me of the silent timer to my invincibility.