in ations ▁and ▁secondary ▁or ▁specific ▁del us ions , ▁represents ▁an ▁intr usion ▁into ▁w aking ▁conscious ness ▁of ▁processes ▁associated ▁with ▁stage ▁ 1 ▁sleep . ▁It ▁is ▁suggested ▁that ▁the ▁reason ▁for ▁these ▁intr us ions ▁is ▁that ▁the ▁psych otic ▁subject ▁is ▁in ▁a ▁state ▁of ▁hyper - ar ous al , ▁a ▁state ▁that ▁can ▁lead ▁to ▁what ▁Ian ▁O sw ald ▁called ▁" m icro - s le eps " ▁in ▁w aking ▁life . ▁ ▁Sub ject s ▁may ▁also ▁experience ▁sleep ▁par al ysis . ▁ ▁Cultural ▁references ▁▁ ▁The ▁ancient ▁Chinese ▁text ▁" Z hu ang zi " ▁ ▁The ▁video ▁game ▁Never ending ▁Night mar es ▁ ▁The ▁film ▁An ▁American ▁W ere w olf ▁in ▁London ▁ ▁The ▁television ▁program , ▁Star ▁Tre k : ▁Vo y ager , ▁Season ▁ 4 , ▁E pisode ▁ 1 3 , ▁" W aking ▁M om ents " ▁ ▁The ▁Doctor ▁Who ▁Christmas ▁special , ▁Last ▁Christmas ▁ ▁The ▁movie ▁In ception ▁ ▁The ▁movie ▁W aking ▁Life ▁ ▁The ▁movie ▁Gr ound h og ▁Day ▁( 1 9 9 3 ) ▁movie ▁on ▁IMDb ▁ ▁The ▁album ▁Until ▁the ▁Qu iet ▁Com es ▁by ▁F lying ▁Lot us ▁ ▁The ▁book ▁Doctor ▁S leep ▁by ▁Stephen ▁King ▁ ▁The ▁com ic ▁book ▁series ▁The ▁Sand man ▁( Vert igo ) ▁by ▁Neil ▁Ga iman ▁ ▁See ▁also ▁▁▁ ▁Luc id ▁dream ing ▁ ▁S leep ▁par al ysis ▁ ▁RE M ▁sleep ▁