Update (Oct. 17): Eyewitness reports indicate a bright meteor was shortly before the explosion, so it looks like this may be the real thing. Most likely it blew up well above ground, but I'm hoping to hear more stories soon.
News from deep in the Australian outback is that residents of Alice Springs last night heard a boom and felt the ground shake. Aviation accidents have been ruled out, so who knows? That's a pretty remote region for an accidental dummy weapon drop.
If I hear more, I'll post.
And I swear, I'm not arranging this as a publicity stunt. But the book officially comes out Monday. :-)
Tip o' the Whipple Shield to Thomas Siefert.