I had three creepy ones recently.
I was a lone astronaut that had just landed on the moon. I got out of the ship and strode a few meters from it, just getting a feel for the area, and turned to look at the Earth. It was awesome.
And then I noticed the small pops of light beginning to spread all over the surface. The atmosphere was cooking under a barrage of mushroom clouds. I call mission control. Static. Call again. More static. No contact. Just dead snow.
I lower myself to sit there and just listen to the radios feint crackle of static, watch the world burn, waiting to suffocate, alone.
I was in my home, pitch black, walking to the kitchen for a drink. I notice two very faint orange lights, like reflections, hovering in the hallway. I focus on them and start to make out a very dim outline, like a human shape, almost clear, hunched as if it had been creeping towards me and frozen in mid step when I looked at it.
Then it jerked it's transparent head, and as it moved, it's eyes flickered like orange strobe lights. Whenever it moved, it's eyes would flicker, like they were powered by it's movement. Then the two lights began flashing and darting towards me, lightning fast, blinding me.
I was in a strange town, visiting someone. Everyone had marks on their faces, like pockmarks from bad acne, but in strangely symmetrical fashion. Some of them even had shallow lines tracing from one neat hole to the other, some what like a schematic of the facial structure.
I was talking with a woman who was changing her over shirt, and I saw the same holes and lines were on her shoulders and arms as well. As she was changing, her eye began to twitch, rolling in it's socket, making a whirring sound. She looked embarrassed and asked me to give her a second, getting out a small zip up tool case from her pocket and taking out a very small black screw driver, like a thin alan key. She pushed it into the pin prick hole above her brow and began to twist it.
She noticed my confused expression and comprehension dawned on her.
"Oh... your a human"