I believe the eyeball sockets light up.
In all honesty, I didn't pay that much attention to the details, nor did I have time to get into a discussion with the Owner.
I just found it amazing the amount of overall time and effort this must have taken.
Did you ever watch a show called "American Chopper" on TV a few years back? Story about a family, Dad and sons, that built custom bikes for all kinds of people and all kinds of themes. They built some pretty "rad" 2 wheelers.
I was guessing the eyeballs or the mouth, might have some sort of LED lamps in them.