Abby controls the right side of the body while Brittany controls the left. Their anatomy is, obviously, quite complicated. They have two hearts with one shared circulatory system, four lungs, two stomachs, etc, but they share most organs below the navel. While they were born with three arms, one was removed surgically, so each controls one.They're incredibly in sync. Though the twins have separate brains and claim that they can't read each others' mind, their twintuition is extraordinary. The girls can speed-type emails without speaking to each other - even though they each only controls one hand. They even play the piano.With all these talents operating a runabout personal watercraft was a fairly easy task for the famous twins. Pro Rider Magazine gives a big thumbs up to the girls!           [fblike]