When I got back to the main road there was no Explorer in sight, so I forgot about it and went on. I rounded the corner and the Explorer was back. It sped toward me and pulled along side quickly. There was a man and a woman in the car and I felt no menace from them. I expected that they would ask me for directions. Instead, in a Midwestern Accent and with an expression of complete exasperation the man said to me, "Do you know where that alarm is coming from?"
I must have smiled and replied, "That's not an alarm. Those are cicadas." He clearly had never heard of a cicada so I elaborated. "It's a bug."
"Yeah, they come out about every 13 years or so."
He did not find it amusing but I quickly was, he shook his head and said, "It has been driving us crazy!" I laughed and walked off thinking of this poor couple driving around Charlotte trying to find the alarm that was going off! Well, I hope they can relax now and they sure gave me a good laugh.
Update: Since some of you live where you do not have cicadas, here is a short video of my backyard so you can hear for yourself. Enjoy!