We are talking about a fire bottle. They all have pressure relief valves. If it does go off it is going to make a mess and may put out a fire:

http://en.wikipedia.org/wiki/ValuJet_Flight_592

Not oxygen generators.

Catch up on Mythbusters' Extinguisher_explosion which was a good one.

Plus it is only a 10-20 dollar fee. The shop I went through did not send it that way (or ate the cost). Nor did the UPS I sent it through. I told them what it was and they did not even know of a hazmat fee (let alone what a fire bottle is).

Plus let me state I really do understand the added cost as I am just starting up. I am still borrowing safety equipment, and will as long as I have a good friend (Helmet, Suit, and HANS).

Also forget the EKG, maybe auto defibrillators like you can find at the airport. Though you would have to use it yourself due to the fact that some is afraid of being sued. Put the button right next you your starter, just hit the right one.

Get pissed off at the lawyers that take on stupid cases, not the governing body that is trying to keep the insurance company happy.