Andy your post made me think of a great signature line I once saw on a technical forum:

"I wish I lived in Theory because everything works there"

LOL <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />

I understand the theory. <img src="/ubbthreads/images/graemlins/wink.gif" alt="" /> It's the real world considerations I worry about such as the folds on the bottom of the paper bag that water may not have reached before the flame gets there. I'm guessing water goes in first and then you wait a second or two for the water to begin to saturate the paper before you turn on the flame.

Bottom line is that I think I'll try the paper bag experiment outside first <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />