The Leviathan limit

Then, all at once, a colossal weight descended upon me, as if the air itself had turned to lead. Every superpower has its drawback. The last molecule of adrenaline inside my body had been used up. An overabundance of tryptophan flooded my cells and I collapsed backward into the snow. I lay there, barely able to lift an eyelid. A crunch of footsteps reached my ears. The second shooter edged slowly into view, rifle raised. I searched desperately within me for The Leviathan, but as quickly as he’d arrived, he was gone.

Full blown centera; nervous system fatigue is just as shitty as it sounds. As I said, every superpower has its drawback. Hysterical strength is great, but in just over a minute I’d burned through every last molecule of glycogen in my body, and now my cells were quite literally running on empty. I’d mega-bonked. I felt as though I’d been hit by a cement truck. My brain, which had been functioning at hyper-speed, was suddenly stuffed with cotton, and despite the machine gun aimed at my face, the best plan I could come up with on short notice was taking a nap.

I closed my eyes. It was very quiet. Peaceful. I almost drifted off but a crunch of snow jolted me back to consciousness. I kept my eyes closed, pulled in a lungful of air through my nose. Let it out. After a couple more I found the strength to force one eyelid open a crack. It felt like sprinting a mile.

The second gunman edged toward me through the snow, aiming his rifle as best he could in that ridiculous helmet. He tip-toed, carefully, as if on thin ice. Thirty feet away. Twenty-five. I closed my eye again and focused on my breathing, trying hard not to fall asleep.
-Sledge vs. The Labyrinth pg. 184-187