I’m a school bus driver and I constantly dream about fucking up hard at work, like hitting cars, running over children and whatnot. There’s always a couple of minutes first thing every morning when I wake up where I sit and think about what else I’m going to do for a living before I realize it was just a dream.
For me the creepiest thing about ancient critters was the first emergence of shelled animals. The shells mean that there were other critters swimming around eating up all the non-shelled animals, but there isn’t any trace remaining of these early predators so we have no idea at all about what they looked like.