Can you forget something during your sleep wake up did something while awake sleep?

This is called "subliminal" learning - it doesn't make you memorize things, but it helps your brain get started learning by being familiar with the terms.

you may have. sleep walking is caused by actally dreaming of something you like or hate

I don't know how, but I tend to snap out of it by opening my eyes as hard as I can. It's scary when you realize it's really happening to you.....

if you cant feel your arm, then you're sleeping in a bad position, happens alot

Then your dead or in a coma