Well, then, you'd probably go 10 days without sleeping if what happened to me happened to you.
I was sleeping a proper good sleep, then all of a sudden I wake up and there's this guy, on his knees on the floor with his hands on my face. He's doing something thats stopping me from moving. I'm confused and trying with all my strength to free myself, to get up from his grasp. It's like he's trying to force himself on my mind by pinning down my body, and i'm fighting with everything I have to beat him. I can't see his face but he's trying hard to control me, after struggling a lot he suddenly disappears into thin air. Then I woke up.
I did give some thought, for about 5 seconds, to the possibility of that being a real "entity" or what have you trying to get control over me or fuck with my in any way. Then I laughed and thought, what a trip, and went right back to sleep cause I don't believe in that shit. Later that night I woke up from a nightmare again, but I can't remember what it was, just a bad feeling. Then I sat up and thought I saw a man in my room. After a few seconds I realized it was just the way my coat was positioned in a corner. Went straight back to sleep.
I got no problems sleeping, especially after a good fix. I've slept in hostel rooms sharing with 24 people with some of the people having loud music and shouting like it's a nightclub, all night long, and it didn't even wake me up.