This taken from a friend of mine on another board, you think those pix are bad, you have to see the rest of the car and what is lef of the bottle.
The way the car was wired, with the ignition off the heater would bypass the temp switch. When the OWNER installed the blow down tube, he "doubled up" the burst discs, ther by doubling the safety release pressure.
NX was willing to pay for the damage if he would have sent what was left of the 15 lb. bottle and kit to them for inspection. He withheld hoping lawyers would get him rich.
In the end he got NOTHING!!!!!!!!!!
http://www.bettendorf.com/~mrbone/pictures/NX%20BOOM!!!!/