"Surprise (pronunciation (helpĀ·info)) is a brief mental and physiological state, a startle response experienced by animals and humans as the result of an unexpected event. Surprise can ...
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have any valence; that is, it can be neutral/moderate, pleasant, unpleasant, positive, or negative. Surprise can occur in varying levels of intensity ranging from very-surprised, which may induce the fight-or-flight response, or little-surprise that elicits a less intense response to the stimuli." - (en.wikipedia.org 22.11.2019)