was thumbing through his book again (never leaves the bog) and there was a note about linseed oil and cottonwool can spontaneously combust anyone ever tried this? sounded interesting looks like i might have to get some linseed oil...
Hay bales burn aswell if they are damp, living in a farm I've seen many haystacks smoking, but not in ablaze though, but it can happen.
If I recall correctly that was also mentioned in the book.