The baseline human world record for static underwater breath-holding is over twenty minutes.
However, holding your breath while engaged in strenuous physical exertion rapidly burns through the body's oxygen reserves, capping maximum survival time at two to three minutes. Combined with the small pocket of air trapped in his inverted helmet, Jason estimated he had five minutes at absolute maximum before hypoxia set in.
A silent five-minute countdown began in his mind... He had to move fast!
Crossing the threshold, he found himself in a nanobot disaster zone. In the brief time it had taken him to enter, the vibrant green markers had multiplied dramatically. What had been scattered, pea-sized dots were now dense, carpet-like patches of seaweed covering the facility's floor, and the patches were rapidly expanding.
