I get it now.....
Some Mayan guy: Alright guys, we are almost past 2012.
Another Mayan guy: What number are you on now??
Some Mayan guy: Let's see....December 21st *pow*
*In the background in a helicopter lies Sarah palin with a sniper*
Palin: Vote Palin 2012 BITCH!
Some Mayan guy: OH GOD THE CALENDAR ENDED WE'RE ALL GONNA DIE!!!!