When you have the misfortune of having lived with a pseudo-psychotic nut job. The widely accepted medical explanation for such behavior are: extreme narcissism, an ironic level of childhood insecurity and/or why-won't-anyone-want-to-sleep-with-me disease.
"Hey did you hear Ron moved again? Didn't he just move into that awesome apt?" "duuuude, you didn't hear??! He totally got roommated man!!" "Ooooh.... FUCK."