I did read the thread and not trying to malign the dead, but the story said there were marks on the beach from where he was trying to fight the kite. Seems he could have released there, but it might have all happened too fast for him. Just trying to see if there's a lesson in it.
the lesson I take from this is that when there is a kitemare it's not the first hit that is the most dangerous, it's when you get stunned from that first hit that you lose control of the kite and it powers up in bad ways. The best way to prevent this is to wear a helmet so that when that first slam hits, you are still alert enough to hit the quick release.
I think the most famous kitemare caught on tape is from Kevin Kearney in florida during tropical storm Fay, he gets picked up the first time and slammed into the ground, he is stunned for somewhere around 1/8 of a second, that's when he really loses control of the kite and gets slammed into a building. Notice that Kevin was racing in to try to beat the storm and land his kite that's an incredibly dangerous time, when you are racing into shore so you can land before the squall hits. Sometimes it's safer to just sit in the water release the safety, self-rescue and swim it in.
You can't release when that gust first hits you it is quicker than thought itself. Trying to quick release when that gust first hits is like trying to catch a bullet after it leaves the barrel. By the time you realize it's time to get the quick release, you get slammed into the ground. This is when you need to hit the quick release and in fact most of the time that's exactly what happens, kiters release their kites right then. And if your head hits the ground, you will be stunned for a moment and unable to release, unless you are wearing a helmet. The second time the gust picks you up is when it really gets dangerous.
and of course my thoughts and prayers go out to friends and family, it's a terrible tragedy.