If it catches you that's it. There's no more running, no more second chances. You're caught.
"But I can't keep running forever. I just can't." I told myself. "I'll run out of breath eventually and if it doesn't stop chasing me as I run, then when I inevitably do run out of breath, it was all for nothing. I can't keep running. I can't"
"Tough shit" I replied, as I got up and pushed the dark thoughts aside, ready to start running again.