Wooh, Dee Dee, that's a great success rate with WBTB!!

I still don't understand one thing about it, though. I've tried WBTB a few times, however, I only stay up for a couple minutes. I'm afraid that once I wake up completely, I won't be able to fall back to sleep.

Is it completely necessary to actually get out of bed and walk around? If so, why? Is it so you will eventually get very sleepy again or does the brain have to be completely alert before going back to sleep? I'm the type of person that once I'm awake, I'm usually quick to become very alert - which is why I'm afraid to stay up too long for I might not be able to get back to sleep.