When you're stuck in Eastern Europe and can't get a flight back to the states because of a volcano in Iceland. Check for a route that goes East instead of West. That would be your backflip route!
A dude calls me and tells me that he's stuck in Rome because all flights have been canceled to the west because of a stupid volcano in Iceland that no one knows how to pronounce.
I says, "Dude, check your backflip route! Check out a way to get through Bangkok, Singapore or Seoul.