I read this fic awhile ago where Dean is in a mental hospital (pretty sure due to trauma) and Sam follows him pretending to suffer from depression. Dean is called Michael because nobody knows who he is & at one point Sam is thinking about how he really is a Michael now. At one point Sam “adds insomnia to the list” and refuses to see Bobby. I also remember another part where Sam is lying awake listening to the scream of the mental ward (lol doesn’t that sound lovely?)