I accidentally untarred archive intended to be extracted in root directory, which among others included some files for /etc directory.
I went on to rm -rv ~/etc, but I quickly typed rm -rv /etc instead, and hit enter, while using a root account.
Rest in peace my granny,she got hit by a bazooka
(got no clue why, but really FEELS like an appropirate reaction to have, I salute to you and your pain sir!)