I used to have this really intense recurring nightmare once every couple months that kind of played out like a survival horror video game. Myself and several random folks I don't know would suddenly wake up in the middle of this hallway. At each end of the hallway was a stairwell going up to another similar level of hallway, and also a door that led to a dark, empty room. Shortly upon waking up here, we would hear this menacing growling noise, getting closer and closer. Then, on one of the stairwells, we would see this huge behemoth of a monster descend down the stairs. It looked something similar to the behemoth from Heroes of Might and Magic 3, with massive claws and sharp fangs.
Well, the minute this thing spotted you, it came rushing at you, and it was fast. It was about twice the speed of a human, so you could not outrun it if it was close. It would always leap upon a random stranger and start tearing him apart, while everyone else would scatter in the other direction. Either myself or a nearby stranger would enter a room at the end of the hall via one of the doors and realize that the beast either could not sense us or could not break through the doors to get us in these rooms. So, we'd wait until the growling disappeared, and then we'd venture out and up a level. Sometimes the monster would catch us out in the hallway but be far enough away that we could sprint to the nearest door and escape into a room and hide, usually making it by the skin of our teeth. This process would repeat until there was maybe 2-3 of us left, and we'd be on the top level, where there were no further stairwells left to go up from.
At this point, in the middle of the top hallway, would be a huge hole in the wall that would lead to a dark cave. Inside this dark cave would be a glowing red orb floating about a few inches above a pedestal. If you touched it, nothing happened. However, there were three switches on a wall that if pulled, would cause the orb to change colors from red to blue. This would also set off an alarm that would make the beast immediately come rushing to the cave. It was at that point you had about 1.5 seconds to run to the blue orb and grab it, which would teleport you back to the normal world outside.
Had this dream probably 40-50 times, but it's been a few years. It got to the point where if the dream started, I was lucid and immediately recognized what dream it was, which increased my chances of getting out. Sometimes I wouldn't make it, and would wake up in a cold sweat right as the beast leapt at me. Maybe I played too many video games or watched too many scary movies, who knows. Still amazes me how much I remember to this day even though it's been a long time.