ghosts and hell
The sixth  center of  power is  located behind  the throat.  It controls  speech  and hearing,  and corresponds  to the pharangeal  plexus.  Its  element is  air, its  color is  the  shade  of  pure sea  water.  From  the  heel, the  Yang Chiao,  or Positive Leg  Channel, rises  along  the outer sides  of  the ankles  and legs,  up  the sides  of  the body, around  the head, and down  below  the car, ending  at the sixth  center.  If  this  channel  is  not  functioning  properly,  one  will  be unable to  sleep.  Also, disorders arising  from  imbalance, paralysis,  weakness, and  lethargy  will be  noted. Form  the  kanji by  placing  the  hands  back  to back  as  before,  and interlocking  the  fingers  inside.  This  time  keep the fingers  enclosed between  the palms,  extending  none. Describe  the  illustrated  figure  by  tracing  five  horizontal  and  four  vertical  lines  for visualization,  using  the thumbs  (knuckle) as  a pointer.  Place the hands  in  the lap. Hold  the head erect, facing  forward,  with  the eyes  closed.  Inhale  deeply  and fully  through  the  nose, filling  the lungs  from  bottom  to  top.    The  tongue  should  be  placed  lightly  against  the  roof  of  the  mouth.   Exhale  through the nose  as  you  hum,  vibrating  the palate  and stimulating  the  Heavenly  Pool.  Empty  the lungs  from  top to  bottom.   This causes the exhalation  to  be  extended  beyond  the  inhalation  and  causes  the exhalation  to  be  more complete.   Because  of  the depth  of  the breath  taken,  the blood becomes  more alkaline.  Repeat this  movement  eighty-one times. This  technique sometimes  involves  the  yogic  Aum  to  extend  the exhalation.   It develops  the psychic sense of hearing  allowing  one to  hear  the inner  voice.  Further, it  stimulates  the proximity  sense  which  allows  one to  feel the presence of  the enemy  and locate him  in  total darkness. At  this  stage  of  meditation,  the object of  concentration  loses  its  associations  with  either  name  or concept; the object is  simply  the object.  The student  comes  to differentiate between  the dimensions  of  reality  and those of  the mind  and gains  access  to the inner  knowledge.             This  center controls  all  of  the  automatic body  functions  ruled by  the cephalic  region  of  the  brain.   It  also  serves as  the psychic  force  which  separates  the astral  body  from  the  physical  at  the time  of  death.   Meditation  on  this  center leads  to the philosophical concept of  oneself-"I  am  that I am."  
-the ninjas 
http://www.angelfire.com/empire/serpentis666/HELL_PAGE.html
-------------------------------------------------------------------------------
http://www.angelfire.com/empire/serpentis666/Magnum_Opus.html