Alex Caizergues sets new world speed kitesurfing record . Frenchman broke record over 500 meters after averaging 56.62 knots . Score: 6 Caizergues now looking forward to next run in fierce conditions .
Alex Caizergues sets new world speed kitesurfing record . Frenchman broke record over 500 meters after averaging 56.62 knots . Run aided by the Mistral -- a fierce cold wind which blows down south of France coast . Caizergues now looking forward to next run in fierce conditions .