HowStuffWorks used to be full of expert animations of automatic transmissions and helicopters around 2006 but they had a multipart article on spontaneous combustion, with anecdotes of 1890s people who retained too much ethanol.
Here it is: https://web.archive.org/web/20090510082422/http://science.ho... (3 pages, and refs)
Here it is: https://web.archive.org/web/20090510082422/http://science.ho... (3 pages, and refs)