Here's one of mine I wrote down a couple years ago:
I found a strange artifact in my brothers bedroom -- an oddly-shaped, cylindrical glass container which could filter all the air in the earths atmosphere through itself and alter the sound heard inside every single conch shell in the world. Instead of hearing the ocean inside a conch, the listener would hear the sound of static and a strange voice which would taunt them from within the shell. The voice would say things like, "Look at me! I'm the ocean!" and make whooshing noises to imitate waves breaking. I was disturbed by the awesome power of this device, and by the bizarre purpose for which it was used. I left my brother's room briefly, and as I walked around the house I noticed that all the air around me was gently blowing toward the room, and there was a faint noise of static wherever I went.
The noise generated by the device also brought all the cockroaches in my brother's room out of hiding (though our house has never had cockroaches in reality) and sent them racing across his floor in panic. I quickly grabbed a newspaper and attempted to kill the cockroaches. One of them was massive -- about four inches long and two inches wide, half the size of the palm of my hand. It was hard to hit because of its speed, and the first direct hit I landed on it only injured it, but I finished it off with a second hit.