I finished a long retreat one year, got home, took a day or so to turn my phone and computer on, and found out that there was a bombing and some people died and a friend from work had been badly injured.
The interesting part to me was that I couldn't find any feelings or any real reaction, it all was just words on a screen. I remember thinking well yeah, I guess that's what happened, makes perfect sense.
It took another day or so for the part of my mind that is concerned with creating thoughts like 'hey, this was a bad thing, you should feel anger and sadness' to boot back up and resume the constant flooding of awareness with negativity.