"So what would you think if two billion people vanished?"

It seems "Rapture! OHSHIT!" really is the most common response to people vanishing. I was hoping other belief systems had some sort of fallback explanation. Also, for a spirited defense of the Alien option. I may need to repost the question to the religious forum. They might be a better source for x religion's thoughts on mass vanishings.

Off to answer emails and suchlike now.