I have a recurrent nightmare, that's the roller-coaster. The roller-coaster starts, and suddenly I'm just falling, the gravity is pulling me as hell. When I'm almost at the ground, I suddenly wake up. I don't really understand why I'm dreaming about this, I love the roller-coasters however I have fear of heights. The worst feeling in the dream is when you're waking up in my opinion.
Sometimes, I'm dreaming about that I'm something like a predator or what, and I'm chasing my family, lol, or in the opposite way, I'm running away from the 'predator'.