sleep deprivation

(Wasn't sure if this is more suited to FC or SMMT, if a mod thinks it should move please don't hesitate.) Hands up who here is currently operating on less than an hours sleep in the last 48 hours. Sometimes I think this will kill me eventually. Nothing seems to work. Drugs just stop working...

Hi. I'd like to know whether polyphasic sleep is a myth and a pseudoscience. I have seen a lot of people talk about the uberman and the everyman sleeping schedule on the blogosphere and I would like to know the scientific opinion on these sleeping schedules and polyphasic sleep in general.

Anybody have any ideas what causes the hallucinations experienced during slepp deprivation?