Anyone able to give me some pointers to achieve these great heights?
There's hardly any wind too!?!! 
(and no updrafts by cliffs)
WTF ..... surely Something has to be causing the updraft. It's awesome how he can go left and right without going down wind
looks like fun, whats he tied to though?
Perhaps one of those wombat anchors in the sand would do the trick.
This might be the one were looking at here , he explains in text how he did it
www.instructables.com/id/The-Stoopid-Thing-Kite-powered-Personal-Flight/
me and my mate do this but we just hook both our safety leashes together and hook it onto both harnesses not as high but still fun especiallycause the other person get draged a lil bit
not fun if you are the person getting towed 
if the anchor rope broke
