Those martians came. They came, they saw, they left.They were not entirely happy with the results of all the intergalactic breeding that is going on around here so they thought they had better leave before their spiecies was corrupted and defiled.
This is no bullshit. I heard it straight from the sister of the neighbors uncle, who was somehow related to the principle of the high school that my brother's good friend's dad went to. (har)