Just to throw in my experience, after 2 days of no sleep, due to leaving uni assignments until the last minute - I managed to convince myself that the policeman who lived in the flat opposite mine was actually living there to keep a tab on me and any illegal fun I might be partaking in on the weekends. Sounds ridiculous i know, but I genuinely believed that, until I got some sleep. I guess stress had alot to do with it, but it's amazing what you can convince yourself of when you're sleep deprived...from all kinds of delerium, to freaked out paranoia.
![[Eek!]](images/icons/shocked.gif)