Hmm compared to everyone else here I am not really that morbid lol. But I often think about things like zombie apocalypse scenarios, what would happen if I was somewhere and a gunman came in, etc. Worst case stuff where me or people around me could die and what I would do. Or how I would try to kill/disable someone in self defense.
oh, and anytime a mass shooting occurs, i usually try to find live footage people took at the time to see what its like to be in that situation.