"Who the hell wakes up like that!?" I woke up like that a few times. I nearly jumped out bed sweating and gasping for air. Some nightmares were intense, but then again, I was also a lucid dreamer and a sleepwalker. There were times when I experienced sleep paralysis, and I forced myself to sit up. In my dream, I saw myself leave my body.
Movies may be exaggerated, but crazy stuff happens in real life too. Some people do have episodes of parasomnia. Movies just make it seem like it happens all the time.