Ragnarök

According to Norse mythology, Ragnarök (the Viking equivalent of the Apocalypse) was predicted to occur today.  Here's are some of the highlights of what you can expect to witness:

Jörmungandr, a gigantic serpent so huge that it is able to completely encircle Midgard (Earth) will be unleashed, which causes a chain of events that will cause the end of all things.  The serpent will begin wreaking havoc amid the seas of Midgard as Hrym (an evil frost giant) sets sail on his ship Naglfar (which is made from fingernails) to cause some of his own brand of chaos.  Loki (a treacherous god of deceit and father to Jörmungandr who had been imprisoned by the other gods) will also join the fray. 

Meanwhile, Fenrir, a gargantuan fire-breathing wolf (and another of Loki's offspring) will open his gigantic mouth.  His maw is so large that his lower jaw will touch Midgard while his upper jaw will reach all the way up to Asgard (the otherworldly home of the gods).

The sky will be cracked in half as the sons of Muspell (fire giants) attack, being led by Surtr (who has a sword that shines brighter than the sun).  Surtr and his horde will ride across and collapse the Bifröst (a rainbow bridge connected the realms of Midgard and Asgard) and then join forces with Jörmungandr, Hrym, Fenrir, and Loki.  This unholy alliance will meet in battle against Odin (the king of the gods), Heimdall (a guardian of the Bifröst), Thor (Odin's son and the god of thunder), Víðarr (another one of Odin's sons), the forces of Asgard and men who had ascended to Valhalla (viking heaven) in an epic, apocalyptic battle.

Fenrir will consume Odin, but Víðarr will avenge him.  Loki and Heimdall will kill each other.  The god of thunder, Thor will battle a giant serpent called Jörmungandr to the death.  Thor will win but will be poisoned by the beast's venom will and die in the process.  Finally, Surtr will engulf the Earth in flames and ruin.

If you happen to perish during Ragnarök, don't fret too much.  Some scholars view this as a cyclic event that has happened before and may happen many more times in the future...