Kite Surfing

In August I saw a kite surfer in southern Michigan not far from Benton Harbor. They are really amazing to watch. I just wonder what happens if they get an itch at any time as to how they might scratch it? Or if the wind dies down when they are far from shore?

In a brisk wind one can really fly over those waves. Then again, I wonder how they manuver over those waves cause the swells move up and down with severity. Also what happens if the kite takes you airborne for a period of time? How does one maintain their stance on their board? Could not an updraft take a person right off that board?

With ever changing weather on Lake Michigan I would hope that those people stay fairly close to shore when they kite surf.