Fun Flash Game: Armed Invasion.

Flying pigs, eh? Was that a 'Pork Link'?

Kids these days may only know flying pigs as those recoiling after being hit by Angry Birds, but I know better. I got a Gund Flying Pig (with a little motor that flaps it wings, but does not get it airborne) from Woot! some time ago. And years before that, I had a Nerf Football with a piggy snout, ears and tail (the only web evidence of such a thing is this picture of someone else's). Of course, there's also Breadpig, but wings made of bread have questionable aeronautic capability (unless they're California Sourdough).

It's already happening! See Geico commercial with pig on a plane.

Filipino:
Kapag gumuho na ang mundo (When the world disintegrates).

My family used to say "when worms go woof" after stories my father loved to tell about the giant 1 meter long earthworms that made a huffing/woofy sound that lived in the Gippsland region of Victoria where he grew up. We had to eat our words when he eventually took us on a road trip to visit his family and we went to the Giant Earthworm Museum.