He was panting, his ribcage actually heaving as the monster struggled to stay up right, tightening his hold on the warm body that wiggled. He tightened his grip on the human as the Monster turn a left, then blinked to the far right gasping out at the effort to use his magic even that much, before he turned and dropped with a grunt.
It was a few moments, or minutes as he leaned back against the sheltering tree he was under, the pine branches here were always thick enough that in this spot there was no snow. When the shaking started, the monster sighed in exasperation at his pinned captive's response to the cold. He tried to ignore it, not wanting to give the human he was holding any more of a chance to rest as he was.
The rapid Resets and Save loads from killing the human over and over were effecting him now, magic bleeding through his bones like sweat as Sans swallowed. The Monster gave a snarl at feeling the human move again, or it would have been a snarl if he wasn't panting still so