Oh geez it's past 4.
I'm not gonna get any sleep. When do I have to get up? Not until 4 p.m., but... I'll probably wake up at noon anyway. Dangit. How much time does that give me?
Let's see... 9, 10, 11, 12... Only three hours?
Wait, where did I get 9 from? It's 4:45. That's 4, 5, 6... forget it.