There were a guy in Toulouse who almost lost his eye to that filling station. The elbow raptured on his air system and a shard cut his eyelid barely missing his eyeballs.
The stress involved flash filling is ernomous. The air system has to take the stress from 0bar to 300bar in a matter of seconds! Incredibile stress in a really short time. This wears the bottle the regulator and the fittings out really fast!!
Most people havent realized how much pressure 300bar is! The standard car tire is filled with 2-2,5bar. There are numerous accidents involving truckdrivers and 10-15bar filled trucktires severely wounding/killing them. (they attempt to fix leaking tires still under pressure)
We are running around with 20 times that pressure in our hands. At the filling station there are always a lot of people and a rapturing tank has the same effect as a hand grenade would.
Now go and play with that mental picture and then tell me flash filling is not an issue!
On top of that manufacturers and laws require that:
All HP tanks/bottles MUST be visually inspected EVERY YEAR (!!!) by an authorized tester.
Composite tanks/bottles MUST be hydroed in every 3 years!!!
After 15 years all composite tanks/bottles MUST be rendered useless and never be used again!!!!!
Peace
Remember people we are risking this:
Now imagine this happening wile your gear is in your hand!
Resource:
http://www.hydrotesters.com/