read liao lar ..
"Physiologically, it is closely related to the paralysis that
occurs as a natural part of REM (rapid eye movement) sleep, which
is known as REM atonia. Sleep paralysis occurs when the brain
awakes from a REM state, but the bodily paralysis persists. This
leaves the person fully aware, but unable to move. In addition, the
state may be accompanied by hypnagogic hallucinations."
dun really get it except for the fully aware, unable to move part
..
