Hearing the disturbing noise of a collapsed air duct behind my wall

There is nothing I dislike more than a bunch of noise. I really do not like noise. I like it to be nice and quiet. My students in school must be nice and quiet. I do not like chaos and everything has to be nice and out together. I am not sure what my problem is. Well I was very disturbed the one day when I heard a strange noise coming from inside of my house. I had no idea what this was. I looked everywhere and I followed the noise. I went right to where I was hearing it from but there was nothing there. I realized that it could be coming from inside of my wall. I freaked out a little bit. I was scared of what was behind my wall. I remembered that I have air ducts behind the wall though too. I listened to when the HVAC system kicked on to behind the wall and that must have been it. I called the HVAC business immediately because I did not like that noise. They made an appointment schedule for me and would be over later that day. When they did come over I told them what I thought it was. It turns out that I was correct. There was a collapsed air duct behind my wall. This can happen sometimes with age or poor installation. They would have to go behind the wall to fix this collapsed air duct. It made a little bit of a mess and it was quite noisy when they did it too. I guess I was going to survive though because this little noise would be gone soon enough.