Q: My friend told me that if we don't protect the earth, there's gonna be a whole in the ozone layer which will cause aliens to come on our planet.  So I told him that's nice. We could learn from aliens. Let them teach us stuff and grow more advanced as humans.  This could totally be a good and productive thing for us.  What do you think Bill?
A: that's nice but if you don't close the ozone after the aliens get here then they're just going to leave