Ok, which one of you was it?

Main Horn Stories
1

http://www.latimes.com/local/lanow/la-me-ln-el-segundo-air-horn-20161115-story.html

2

I think it is…

https://www.youtube.com/watch?v=eRI_SSDRkvo

and

https://www.youtube.com/watch?v=hoogMnQD9s0&t=56s