Has anyone ever been woken up in the middle of the night to a big long sonic boom, followed up this creepy ring kind of creepy long high pitch (almost like nails on the chalkboard) riiiiing that just kept ringing and is starting to make your ears do the same. That happened to me, in middle of the night. My cat heard too, she was laying on my bed, so she jumped up on my window pane to "investigate" it and see if she figure out what was going on. No one in my house heard it, except me and the cat. Luckily, I was not the only one in the city to hear it, there was several people around the city who heard it too. One guy said: I thought we were being invaded by a UFO! LOL!! It turns out what happened was a few miles from my house a powerline caught on fire in the middle of the night and it blew up the electrical wires, causing the boom and the ring.