Rationality wakes up last:

In those first seconds, I'm always thinking some version of this: "Oh, no!!! This time is different. Now my arm is dead and it's never getting better. I'm a one-armed guy now. I'll have to start drawing left-handed. I wonder if anyone will notice my dead arm. Should I keep it in a sling so people know it doesn't work or should I ask my doctor to lop it off? If only I had rolled over even once during the night. But nooo, I have to sleep on my arm until it dies. That is so like me. What happens if I sleep on the other one tomorrow night? Can I learn to use a fork with my feet?"

Then at about the fifth second, some feeling returns to my arm and I experience hope. I also realize that if people could lose their arms after sleeping on them there wouldn't be many people left on earth with two good arms. Apparently the rational part of my mind wakes up last.

Scott Adams on waking up with a numb arm.