It's a very common dream experienced by everybody.

There's actually a scientific explanation. You feel paralysed in your dream because you ARE paralysed in that moment in real life!

During REM sleep (rapid eye movement, deep sleep) when brain activity is highest the brain automatically shuts your body down to stop you from moving.

This is essential to prevent you from carrying out in reality what you are dreaming about.

So it stops your body from being able to move so you can't really go and jump out of a window or knife somebody whilst asleep.

If you dream during this time you'll experience the paralysis in your dream.

I was boring Sharla about this last week,making her listen to me at great length another typically interesting Bilbo lecture