Laughter And Fear

Both laughter and fear are states of high arousal, common during intense emotions. A scream and a laugh are closely related and use the same emotional energy.

If a laughing person isn’t supposed to be laughing, or if the laugh is coming from a non-person, like a robot or a doll, there is a creepiness to it. Example: Alexa, the home virtual assistant from Amazon, started laughing out of the blue in many homes, terrifying families.