Dave S wrote:


Any doctor, nurse, paramedic, EMT, respiratory therapist or gas vendor
can vouch for this.

I was a paramedic and heavily into the equipment maintenance in our
fire department. An amusing story was that one day I was helping
another guy weld on one of the fire engine compartments. Suddenly
he stopped and said he ran out of oxygen. I said we have plenty
of oxygen and went and grabbed the thumper bottle off the ambulance.