Invaders from Mars pods?

There is a rather attractive trumpet vine growing on a Sassafras tree in my back yard.  The lovely orange flowers are certainly long gone but I noticed the seed pods as I was going through the garden so I snapped a picture.

What I didn't know is that the trumpet vine is an invasive species! After reading some of the stories I am becoming a bit worried, but hey--they can't be any worse than the bamboo that is creeping this way from down the street.  The scary thing is the number of seeds in each pod.