if comet ison hits the moon, the moon will fall.

An ESA scientist Said that our moon will stop it's orbital velocity in case Comet Ison hits it.

An ESA scientist called Jennifer Ruach said in a public conference that our very Moon could stop the orbit and fall to Earth in the event of Comet Ison hitting it.
Comet Ison is a comet found in 2012 by 2 amateur astronomers. And it is being called  by some "The Comet of the Centrury" because it will pass really nearby and it will be visible with an naked eye and during Daytime by the end of this year.
On the Event of that comet hiting the moon, it will force the moon to stop it's orbit and make it go towards earth in a freefall.
The results of the moon falling to Earth could be devastating, but not all life will end. "If the Moon hits earth, milions will die, but there will be survivors" Said Jennifer while holding a catalogue of doomsday bunkers, while trying to hide it.

The odds of Comet ison hit the moon are greater than it hitting Earth, but the chances are still not 100% so the end of the world is probably not yet, thankfully.