Nightmares

Waking up in the middle of the night from a dream that felt so real, it happens to everyone; you can feel everything in your dream, and it all seems real. If the dream was horrible than you'd be glad it's over and if it was really good, than you try to dream of the same thing but it never ends  up working. That's the cool things about dreams is that it's something new and interesting each time, how can your mind create so many scenarios ? Well from research, anyone that is present in your dream you seen them before in real life,  even for a quick second, it gets processed through your mind and stays in the memory area of your brain. Dreams are humans natural tv/entertainment at night. 

Usually when your able to live your dream it means that your in the stages of waking up. When your deeply in sleep you don't sense anything or see anything but when your close to waking up, your mind opens up and begins dreaming. It's personally really fascinating that once you fall asleep, and wake up the next morning it doesn't seem like you were asleep that long.