So a few years back I was visiting some friends in a nearby city. The night went well; it was good to catch up with them again, as I hadn't seen them for a while. As the hours wore by, we began to walk towards one of their houses.
Which would be when we heard a blood-curdling scream coming from a side-street. Now, normally in a strange city, I wouldn't investigate this - but we were in a vaguely suburban area, it was relatively well lit, and there were a few of us. So, the girls in the group stayed on the main road, and the guys went to take a closer look.
The screaming did not stop. It sounded like it was coming from a nearby house, and it sounded like the screams of a woman. Maybe a child, perhaps. The lights in this house were on, and as we approached it I vaguely considered calling the police.
But the scream was not coming from the house; it was coming from the garden in front of it. In the gloom I could not see anything distinct, but I could now tell that the scream was coming from the branches of a tree. Something inside that tree was rustling violently, although thanks to the darkness I could not tell what. I exchanged glances with my friends, we paused, and suddenly the shaking - and screaming - stopped.
Silence for a moment. My friends and I exhaled.
And then something moved through the trees, rapidly, and before we could react it was gone. Glances exchanged again, but we were quickly satisfied that whatever it was had left. We walked back to the girls, and continued the evening as planned.
The next morning, I walked back past that same street.
On the road, there was a fresh chalk outline of a body.