This has bugged me for a long time.

It goes back to the Vegas shooting, but addresses some "other" possibilities:

https://m.youtube.com/watch?v=e31b3qNJdWw

Then this is what reeeally runs nails down the chalkboard in my head:

https://www.theguardian.com/us-news/2017/oct/02/las-vegas-shooting-mood-at-mandalay-bay-hotel

I've tried to talk about it, but it sounds so crazy…. Except nothing sounds crazy anymore!