"Roy Smith" wrote in message ...

... Imagine the situation of
a plane sitting on the ground with a fire in the cabin. I would
imagine that would make the inside pressure higher than the outside
pressure, ....


Have you ever seen the trick to get a hard boiled egg into a pop bottle. Put a smoldering piece of paper in there then
put the (shelled) egg over the bottle opening. The burning paper consumes the O² in the bottle and the egg gets pulled
inside....