Eh, it is what it is.

Now, are these "Experts" in the room with us right now? How long have they been talking to you?
- Let's do a seance and find out!
- Ate the onion
  
  Whoosh

Relevant fact for those who don't know: after roughly 72 hours without sleep, you will start hallucinating, which is a symptom of psychosis.
- Eh for me it's about 60hrs. They're minor hallucinations at that point and you're still lucid enough to understand that they're not real. But it just further cements that you're being tortured by your own body. I see things in my peripheral vision, mostly. Things crawling on the floor, liquid running down the walls, faces are distorted until I look at them front on. It's not a good time.
  
  In my experience, wait another day. Shit gets real weird after the shadow people arrive. And they never truly leave, that brain damage is for life.
- How would those 2 hours of sleep factor into things?
  
  Well, that's a good question; I'm not enough of a sleep expert to know, but it's possible the 2 hours of sleep could stave off the effects of insomnia for some time or they might actually stave them off for a full 24 hours more. A standard sleep cycle is roughly 90 minutes long, and there's some evidence to indicate that the raw amount of sleep in hours isn't actually that important for the purposes of restoring the brain's ability to function properly; some data indicates that the grogginess we feel when waking up sometimes has more to do with our sleep being interrupted during a sleep cycle as opposed to at the end of one. So, theoretically, it's possible a sleep-deprived person might feel quite refreshed after just two hours of sleep. But again, I'm no expert.