Did you know that a baby's vocal chords are especially designed to amplify the volume of the air which passes through the trachea up to, something like, 1500 decibels per each individual sound wave?
It must be a survival thing.
Did YOU know that if you kick a guy hard enough between the legs, his vocal chords will revert BACK to his baby years?
No... maybe that would also explain why they drop to the ground in a fetal position?