I was thinking more like, "Mama, I'm a' comin'! " And no, the stone wasn't actually glowing like that. It's just a REALLY bad camera. (I'm never getting rid of it if it gives me the occasional print like this)
Tom, I think those are your two possibilities. Draw your own conclusion... I made some photographs in a local cemetery a couple of years back. One had a very distinctive spirit ghost depicted in an upright headstone, and another shot (pinhole) showed something like steam rising from the stone covering a tomb. It was very cold on both occasions. It's comforting to joke about them, but let me tell you it feels very strange looking at them and considering the 'alternative' possibility...