Oh dear, Mark, you really do need to stop talking about things you know nothing about...
The LiPo sack did something. The cause is still unknown. The evidence has been examined and we are starting to get some information from those that make the sacks, as well as informing them of our findings.
What you saw was a towel and a body that were ignited by the heat. At no time was the sack ablaze. What ended the fire was the prompt action of those that got the sand onto the LiPo, and as a result we had almost none of those acrid and potentially poisonous fumes seen pouring out of the box on the video. There is no way of stopping that, which from a heath and safety perspective is a risk.
You really make me smile. You were the one with the "LiPo is safe, NiMh is lethal" rhetoric. Now it seems you have to admit that LiPo is not safe - buy a vault that keeps the fire in but smothers everyone else with smoke and poisonous fumes!!
This is not the answer to anything. As I said, as a device it raises other aspects of Health and Safety that you seem to want to ignore completely. I think your promotion of this device is ill-considered.
I have no doubt you will post again telling me I am an idiot and you are right. Just remember I was the one saying that LiPo fires were active and potentially dangerous, and you were the one saying the LiPo was safe. Which of course you will deny as well. I know I can't win in a single thread, but in the long term...