>>9780353depends how they were kept awake
if you are using normal torture techniques they will just pass out at some point and not be capable of waking up no matter how much you hurt them
if you use electroshockers you mighz be able to keep them awake enough that they feel hallucinations, unless you fry their nerve endings or let them sleep inbetween the zaps
if you kept them awake with meth or adrenaline they will starts hsllucinating the moment the effects wear off and two weeks of no sleep get into their head
you would usually just get flashes of images, shadow people... and auditory hallucinations, you likely wouldn't get sleep paralysys nor lucid dream as those are states that require larger part of brain active than a sleep deprived person can gather