Remember: everything Sans says is made up.

It was cold, dark, the smell of faint iron and rotting meat could be smelled in the distance. The way to the bridge was empty and even if you knew you should be greeted nothing happened, not even the snapping of a twig from behind you. You couldn't help but feel your fear crawl on your back, it was quiet, too quiet. That's when you eventually saw him sleeping as usual or at least that's what a far-off memory told you - at his station.