World Record,Kaiak extrem,38.7 meters,113 KM/H in 2.9 seconds of free fall.
This drop in the movie "At Your Own Risk"
http://g1.globo.com/Noticias/Brasil/0,,MUL1066003-5598,00-SO+CONSEGUIA+VER+O+CEU+E+O+CAIAQUE+DIZ+ATLETA+QUE+DESCEU+CACHOEIRA+DE+METRO.html