It happens if your sanity drops to 0 while submitting to werelogan during the full moon storyline
By submitting or having sex with certain nps and enemies, like the jelly monster orWerelogan when is in the den out of control
spam insanity potions then do the slimes and save after/before every loss, when you finally actually get a bad end reload and leave the fight instead of submitting then do whatever other bad end you want.
np, have fun with the knowledge!
