Wierd dream thinng?

[Huf]

I have heard that sleep paralyzis is to pervent you to act out your dreams, but today i had a dream without being paralyzed. I where trying to sleep as normal, and i had a dream where i where climbing over the great wall of china or somthing. After a while in the dream i fell off the wall. I fell for like 15 secounds or so, but when i hit the ground i woke up AND JUMPED UP IN MY BED. it happend instantly without thinking. The jumping movment happend when i still was in a dream-state. I took a look at my clock and only 10 minutes had passed since i went to bed. The other queston was aboit how i can dream a dream lime that before entering REM. Because i had only been sleeping for like 5 minutes. Btw i wrote a x on a paper to make sure it wasnt a FA.