it's called lucid dreaming and unless you have a health condition that makes sleep paralysis happen, then it's not that bad at all. Actually, lucid dreaming is the best time to control your dreams because it will give you a very realistic experience. I used to get scared when I experience sleep paralysis. But when I researched about it, I was able to make it a positive experience for me. It's still freaky when it happens but I calm my mind and remind myself that this is just a dream, then I start fantasizing things then that's when the dream becomes heavenly. LOL