I felt the last 3 hours. Then my kid woke me up and I feel like I'm not even tired. Also, have you ever had that dream where you are still going to school and you are enrolled in a class(In this case it's a math class)? You then realize you have gone the whole quarter not attending and not taking any tests. Then, all the sudden it's finals and you're freaking out in your dream and it feels so much like reality that when you wake up you still think it's true.

I just dreamed that and it was not the first time. That is the definition of a true nightmare in my mind.