I work on boats on the weekends, and one of the things I’ve noticed is that passengers who are very seasick will quite literally turn green. This past Saturday there was one person who I could tell was going to be very sick even before we got outside the Golden Gate Bridge - he developed green coloration around his eyes, which later spread to encompass his whole face, and I’m not just talking about a light green tinge - a very distinctive evil green color develops.
Why does this happen? What happens to a person’s circulation? Why don’t they just turn white?