Geez that's creepy. I hate those nightmares that feel real.
I had the dream where you're running down a tunnel, and something's chasing you. I could see the end of the tunnel. As long as I made it to the light, I knew I would be safe. I ran as hard as I could, because I knew something was chasing me. I couldn't see it, but I could hear this rapid clicking and I could feel it coming for me.
At this point, most people wake up.
I didn't. No matter how hard I ran, the end of the tunnel didn't get any closer. I got pissed. I stopped and turned to face the darkness. It got me. Whatever it was ripped into my legs.
I woke up screaming and both my legs from the tips of my toes to my hips were cramped up. Hurt like crazy. I finally straightened them out, then went back to sleep.