When I was young, somewhere around 6 (I'm not entirely sure), I used to hear things when I tried to fall asleep alone in my room. At one point, I imagined a loud banging on the kitchen counter outside my room.
I heard it once, and I froze. My inner voice drowned it out partially, so I wasn't sure exactly what I heard. Afraid as usual, I waited, and then I heard it twice rapidly, and that put me over the edge, so I ran to my mom's room. That was probably the most afraid I've ever been.
When I heard it, I imagined some guy in the kitchen with an empty beer bottle, hitting the bottom of the bottle into the counter. He looked pretty damn sinister. However, I ran right past the counter, not even thinking that that's where I imagined the man and the noise and I was running right past it (I'd probably die first in a horror movie)
I think that was one of the last incidents before my mom moved me into a room with my older brother, and then the noises stopped (presumably because I felt safer).
She pinned the noises I heard on me imagining them because of violent video games at a young age, but I'm still not really sure that's normal behavior for a kid exposed to too much violence...I believe the games I was playing and/or watching siblings play were Warcraft III and Counter-Strike. I don't remember finding them scarily violent, though.
Aside from that, I've also experienced lucid dreams, though I'm not sure which one I'd called more unique.