Brittany guy's example "I was unable to let go" is the dystonic reaction with throwing; a baseball, cricket ball or dart, and also archer's "target panic".

Tamid: A recoil/noise/sonic concussion anticipation "flinch" is a "duck & cover" avoidance response, and very likely has a survival advantage. Videos from the Boston Marathon bombings show everyone, to some degree, "flinching" ie. closing their eyes, turning away and ducking.

This "flinch" is not a dystonic reaction however


https://sites.google.com/a/damascusknowledge.com/www/home