Bethe, you know it, but I would like to emphasize that nitrate film produces toxic gas when burning. One reason more to be carefull when doing so.
I have a large back yard (2 acres). I'm also working on rigging something up so I'll be standing a few feet away using a long match and not holding the neg. It does come in handy being the daughter of an engineer - something genetic in the thought processes, I think. Something for others to consider, though.
(And this is yet another time I miss being at the lab and having a fume hood handy, not to mention the chemicals).