creep-out moment

So there I am trying to go to sleep and all of the sudden I hear walkie-talkie transmissions. My first thought was that there were cops outside of my house which freaked me out because I haven't done anything illegal in a while. So I went to the computer room to check it out (sans any protective gear like a knife or baseball bat) and looked out the window (yeah stupid I know, I'm like one of those idiots in a horror movie). Nothing outside. Then the voices again (and not the normal voices I hear I might add). All kinds of cb talk "10-4, Roger that, blah blah blah." Turns out that if I leave my computer stereo on, it picks up some short-wave frequency. I couldn't tell what is was though, maybe a taxi-company. But it freaked me out a little.