Here is the link to Cecil’s column.
http://www.straightdope.com/classics/a1_205b.html
I hope your statement is meant in humor.
First, the title is a misnomer. From what Cecil said, it’s not spontaneous. An ignition source is often found, such as a match, a cigarette, a nearby fireplace, a lamp, etc. A better title would be “Anomalous Human Combustion”.
Second, there needs to be another update to Cecil’s column. I recently watched a TV program (either on Discovery or TLC) that examined “Spontaneous Human Combustion”. After playing with the historical and paranormal type explanations, they then hit the most recent scientific findings.
Scientists working on the “wick effect” theory set up a burn test. The Wick Effect is as noted the burning of the human body fat, causing a slow, smoldering fire. The test was set up with a room modeling actual “SHC” sites - furniture placed around, flammables like newspaper and cloth curtains, etc. The body chosen for the test was a pig carcass from a butcher - pig tissue is similar to human tissue, especially in fat content. They wrapped the pig in cloth and sat it on, I believe, a chunk of carpet. Using a little gasoline as accelerant to start the fire, they set it aflame and watched. The gasoline burned quickly, then the fire slowed. But that gave enough time to start burning the cloth on the pig, and then the pig started burning. And then the wick effect was seen in action. The body would melt the fat, which would burn trapped in the carpeting, and it smoldered with a small flame (16 cm?). This fire proceeded for 8 hours being monitored the whole time. During this 8 hrs, the furniture and flammables like paper and curtains that were within inches of the pig did not ignite. The pig carcass continued to burn in a contained manner, reducing the bones to ash. They stopped the test after 8 hours before the fire burned itself out, but the results were clear that the burning was a smoldering by the wick effect, and “SHC” has now not only been explained, but demonstrated.
There is nothing paranormal involved. It seems anomalous because people expect fires that hot to spread, but the nature of the fire contains it.