It never occurred to me that I couldn't change things that needed changing or couldn't have what I wanted if I worked hard enough and was good enough. ↗
I've seen novels that have grown out of one story in a collection. But it hasn't occurred to me to take any of those stories and build on them. They seem very finished for me, so I don't feel like going back and dredging them up. ↗
I heard that the same thing occurred in a scene in Alien, where the creature pops out of the chest of a crewman. The other actors didn't know what was to happen; the director wanted to get true surprise. ↗