A cellular tower caught fire in Wellesley, MA. I happened to be driving by, and was at a red light, so I went to take a video clip of it burning, when I caught it falling over.
The horns you hear are several cars in front of me, not behind me. The person at the light was too interested in seeing the tower fall and didn't notice the light turn green, lol. That was good though, 'cause it let me take the video without moving for most of it.