Why does screaming relieve physical pain? What is going on in the brain when we scream? Plus a bonus question: why do some tennis players grunt when they hit the ball?

 

... We explain like i'm five!

 

Thank you to the r/explainlikeimfive community, and specifically the following reddit users whose questions and responses formed the basis of this conversation: needsugar_daddy, tacodelmorte, shamanicrabbit, 2as_ron87, alphawhiskeytangofu, jazzman23uk & madjohnfinn

 

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