Spontaneous Human Combustion - Fact or Fiction?

[JRussell]

I've always thought of Spontaneous Human Combustion as more of an "urban legend". That was until I recently watched a show about it on the History Channel (it airs again around May 5th). This show has some pretty convincing evidence that SHC might actually exist. One of the main points they talk about is the fact that many of these people can burn to the ground (bones and all), yet newspaper and clothing 2 feet away remains completely untouched.

Here's a link to a website with some of the history and theories behind SHC: Link (there is one old B&W pic at the top which may be NSFW, although it's hard to even make it out)

What are your thoughts on SHC? Does it exist? If so, what do you think is the most likely cause?