Surprise Sounds

Last night I tried recording to see if I'd get any sounds, and much to my amazement, I found this one. A week or two ago I tried recording but when I turned it on to listen to it, I didn't hear anything but a sound like the recorder turned off, so I hit the stop button. Apparently it wasn't the recorder turning off, but the first of a series of sounds. Towards the end you will see how loud it gets. It amazes me that the recorder can pick up such loud sounds even though I can't hear them until I play the tape back. At the beginning of the tape, you can hear how quiet the recorder is when there is no other noise.