Yeah. I call them "James Bond" dreams. When I was younger, they were more about running away. Slowly, they evolved into going to other direction, where I'm the pursuer. What you are experiencing is the opposite of "Hypnagogic Isolated Sleep Paralysis." Normally, when you sleep, your brain shuts off the motor functions. In some cases, this process continues even after you start to wake up, leaving you paralyzed in the dark. When that part of your brain isn't shut down during sleep, you have the opposite problem that you are describing. Generally, it is the result of "hypervigilance." If they are causing you a problem, focusing on recognizing and appreciating moments when there are no threats; a minor meditation that you repeat when it is obvious. This will sound weird, but learning to play drums will also help. It trains the executive "stop and start" functioning in your brain. As a matter of fact, all children benefit from this, as well, as it trains their impulse control.