Board Thread:Questions and Answers/@comment-44330395-20191109231530/@comment-37197608-20191228055304

You don't, well technically you can without dying, but it still requires hacks, and Sans still dunks you on, but if you make yourself invincible, after a while, the bones will disappear and Sans will just be stuck shrugging and winking at you for all eternity, effectively softlocking the game if I'm correct.