Ok, I know threads like this ("was it SP?!?") have been posted hundred times already, but I really need answers!

So, Im dreaming briefly in the morning, and I dream that I'm in a red, little floating... Thing... Suddenly, I wake up, but I lay still, and I manage to build up a dream scene again. But, just as I'm about to enter a new dream scene (still feeling my body in bed) an EXTREMELY storing wind blows my hair straight backwards, and suddenly the gravity shifts, and I'm falling down. My surrounding are completely gray. Just. Gray. No textures, no shadow. Just one gray shade color.
Anyway, after falling down a bit, I'm again in bed, but still with the roaring sound of the wind in my ears. I try to move, but it is almost like the air around me has become compact. Still, I manage to move my hand a bit. Then, starting on my head and going down to my toes, the compact air disappears, and everything is normal again....

Now my question is: What WAS that?! It wasn't scary or anything. I first thought that it was SP, but I COULD move my hand... And if this happens again, what should I do to turn it into a lucid?