Sans doesn't seem like he had the energy to go on life anymore, sitting alone in his cell with his white eyelights darted in the ground. His permanent grin being bitter, his eyes looking sad. Papyrus, his one and only family, his friends and the people of Snowdin. But now he's in jail, he knows what he did but he thinks it was justified to do something like that. Sans never was irrational before but this proves how he didn't self-improve. Thinking, he sat alone in his cell with his head down.