Anyone who thinks their technique can't go wrong, such and such a kite can't launch accidentally, etc., needs realize they are wrong.
One thing to remember, is that self launch techniques are very often needed in places that are not ideal for kiting in the first place.
If the beach was ideal, with good wind, maybe there would be other kiters there to help more often
I've seen a lot of weird things happen with kites, and I don't even ride that often, living 100km+ from spots...
I have had to do lots of sanded, sandbag, tether, drift, hot, warm and cold launches, often off water that is not flat enough, beaches that aren't wide enough, etc.
I've seen parked kites on the beach turn around and launch themselves when the wind suddenly veers 30 degrees or so -fortunately with no one attached.
I've had drift launches of C's, SLE's, and bows turn into hot launches due to wind gusts, currents, or chop rotating the kite and getting wind under it.
Once I reverse relaunched a 15m fuel from 2005, in about 10 knots.
That's not supposed to happen. Too bad I could never duplicate it.
Anyway, don't get too cocky.
By the way, just about any kite can
hot launch from an on-its-ear position.
All it takes is a little wind oscillation (or bad terrain, careless positioning, etc.), the kite can backwind, start to fall onto its nose, and be caught by the wind again before it is nose down on the sand.
Next thing you know it's shooting up.
Rare, often associated with user error, but it does happen.