Scaling in Photoshop this looks to be around a 60 to 65 ft. jump or roughly 20 m. Seems higher?
Stance Kiteboarding posted this on FB with the following caption:
"Le véritable sens de "s'envoyer en l'air"" (The true meaning to "send in the air") "... Rider : John Glais (Cabrinha, Kitaddict), Spot : St Malo. — with John Johnn."
St. Malo is in Brittany in Northern France.
St. Malo in pre-kiting days
http://www.artandarchitecture.org.uk/