It's the prophecy from Garabandal. First, a World-Wide Warning that will happen in the sky...like the collision of two stars that do not fall down...* I inserted comets instead of stars for the heading of course. But the visionaries said the warning will be 'like' two stars colliding. What if what they were seeing was two comets?
Comet Encke and Comet ISON are converging for a photogenic close encounter. “No they’re not going to hit each other – in reality they are millions of miles apart – but as seen from the STEREO-A spacecraft, they are going to get very close!” - Source
General Absolution. It could happen.
*To view the entire account of the events at Garabandal see the Garabandal Story.