the morning cram [you wouldn't believe it if I told you, but I can run like the wind blows edition]
"For no particular reason I just kept on going. I ran clear to the ocean. And when I got there, I figured, since I'd gone this far, I might as well turn around, just keep on going. When I got to another ocean, I figured, since I'd gone this far, I might as well just turn back, keep right on going."
NPR reports the runner's high that pushes some beyond their bounds may have been an evolutionary development.