Some events are unexpected and require one to adapt. The amount of time given to adapt can vary depending on the event in question. In some cases, one might be afforded a lifetime to adapt. Consider a parent whose child just starts talking. In other cases, the time can be limited. Consider college. At the other extreme, there is no time to adapt. All of the above fall into a category often called a surprise.
Case A provides an example of a surprise:
Brother walks into bathroom. Sister sees Brother and waits around the corner. When Brother leaves, Sister pops out from behind the corner and yells, “Boo.” Brother jumps, and Sister laughs. Brother returns the favor a few hours later.
In the above example, the party who generates the “Boo” instigates the surprise while the party who jumps receives it. Not all surprises are necessarily unpleasant for the receiver. Surprise parties are just one example. Case B provides another:
Traveler and Explorer are great friends. Traveler makes plans to go to Unfamiliar Terrain. Explorer makes plans to go to Unfamiliar Terrain. Traveler is unaware of Explorer’s plans. Traveler and Explorer overlap in Unfamiliar Terrain and run into each other.
Not all surprises are between two parties. Perhaps the most satisfying are the ones in which we discover facets of ourselves we never realized. These are called epiphanies.