Lol, that is how I test stoves to tell if they are ported for LP or NG. just light it up and you will know right away the orifice needs to be changed. I have seen folks try to use them that way, and it is extremely dangerous. The propane does not fully burn correctly because it is way too rich of a mixture and the poisonous exhaust gasses are off the chart, they can kill you very quickly.
So True! :-O
YIKES!