This is the quintessential way to activate the Mammalian diving reflex at brunch, cocktail parties, the office, or the classroom. Unless you are inclined to pan

This is the quintessential way to activate the Mammalian diving reflex at brunch, cocktail parties, the office, or the classroom. Unless you are inclined to panic, you and your more medically-minded friends will be fascinated by the significant and immediate effect it can induce on your PNS and heart rate.