All Human Beings Are Also Dream Beings!

Ok guys so i have been at this Lucid dreaming for about 3 weeks now! i will never give up on my goal to become lucid. recently I can say that i sort of had a lucid dream, but something wierd happen and i would like to know if any others experienced this same problem.

the dream began with me at a mall with a close friend. Both of us were doing the normal window shopiing when my friend decided that he wanted to go buy a gift for his girlfriend. I told him i would go to the apple store, while he did his shopping. so my friend and i both went seperate ways---i of course proceeded to the apple store. it is in the apple store when things start to become strange. As i am waiting for my friend everything around me starts to fade---it was wierd the dream just start to disappear and i felt like i was just in a room filled with darkness. Then i noticed a white figure that start to arise from the darkness. It was a round white figure---at first i could see black smudges around it, but then as it start to come closer i noticed what it was. the round figure was a clock, like the one that sits above a wall in your regular classroom. It was strange, because everything was pitch black, and this now obvious school clock was floating towards my face. But then i noticed something else---the hands on the clock were spinning really fast! In fact they were spinning counter clockwise. That's when my mind realized that i was dreaming! and my voice called out this is a dream! after that the wierdest thing happened a strange noise arose like i was being sucked into the matrix after i realised i was dreaming. Even though i knew I was dreaming things were still pitch dark---i tried to move, but i couldn't. It was then I told myself "ok i know that I am awake, and this is first step towards lucidity, so i will just tell myslef to wake up". And there I laid in my bed, very happy with my first Lucid dream

Sorry for the long story but my question is: can anyone explain why i couldn't move? no matter how hard i tried i was stuck! But i knew that i was dreaming so i dont feel like it was Sleep Paralysis