Any movie, television show, written work, or other produced media that specifically focuses on disasters and their ramifications. Cities crumble, oceans boil, and our hero may or may not survive the incident, but we all get a front row seat to the worst possible scenario. Often features scientists or other researchers making predictions that are then ignored by authorities until it is too late to take heed. See Volcano, The Day After Tomorrow, 2012, Twister, Independence Day, White Chicks, Epoch, The Core for examples.
porn that has gone horribly, horribly wrong.