15 seconds in, a bright blue light very quickly appears and disappears on this video, shot with an automatic camera. No explanation, beyond the comment that it could be a CGI effect, but if so, it seems like a very strange sort of hoax. Then again, hoaxers are by definition pretty strange? There isn’t enough video information for us to rule out CGI, but it seems fairly unlikely.

Story Source:
http://www.youtube.com/watch?v=7KhOTKRW_Ps