welli can tell u i have a similar problem ,and it is from a mental illness ,an unstable imotional problem ,where the emotions are so unstable and cause the emotions are so unstable ,the imaginations all get pumped up to much ,and false imaginations come in .when i was sick i couldnt get on a plane ,cause i believed i was going to open the door of the plane and jump out ,i was in a state of panic ,then if a car went past ,i was going to jump in front of the car ,and then if there was a swimming pool ,i was going to drown myself ,that is cause the emotions were sick and unstable and u need some drug to slow u down ,so that the unhappy emotions can get better ,and stable again ,so that the imaginations dont get pumped up ,,u do need some drug to balance u ,ok i went through it myself ,ur going excessive beyond ,into nonsence in the mind . i have an image in my mind im stabbing people all the time ,everytime i see people ,the image comes up to stab them ,it is only a image , but it can be scary ,but im use to it ,and what it tries to do is make u feel u r a killer ,it is trying to decieve me ,make me unstable ,i have put a name on it ,and his name is jack the ripper ,haha once i put a name on it ,it went back into the corner cause it couldnt decieve me anymore by lying to me ,i was not it and it was not me ,it is always there but i have subdued it after so long .it comes from trauma ,which happened to me with my children ,if u go through a bad time then this can happen to you ,and mental emotional problems come along , but i still have this false image ,and it can be nasty ,and sometimes when it is full moon u get horriific evils in ur mind from it ,but all it is is an imagination ,and full of exatragated nonsence ,in the bible it says we have sin in us ,which is evil ,and some how when u go through bad times ,the evil in us can pump up evil imaginations and take control and decieve us ,and bind us ,it can be very powerful ,but the bible says to call to the name of jesus christ and his presense his spirit can come and give u peace