It is tragic that someone died beacuse of a door opening in flight..
The first time that it happened me was in a 206B3 and it was a bit of a shock, but the pax behind me gave me a hand and I soon got it closed, luckily nothing blew out the door. No big drama. It became a regular occurance when flying old 206B2's.. The key is not to panic, if you can close it safely close it, if not land. Never stop flying the helicopter!