Gunner Asch wrote:

Not to mention any short duration/ high pressure Jet effect which
launches that bottle some score of yards from where the torch ignited
the contents.......hopefully..in a clear direction....

Well, with 4-5 gal of gas at 175 psig, the impulse is going to be pretty
low. And applied to a tank weighting 18(?)lbs, its resultant velocity
is going to be insignificant. Not that I could actually calculate it.
Even approximately. But I'd stand behind it, no hesitation.

There's another experiment to do!

Bob