A tentacular and befanged monstrosity appeared on Earth before each member of the human race at exactly the same moment. Occasionally a pseudopod passed through someone as if they were immaterial. In sonorous tones, it gave a proclamation in every language ever devised.
“A great mistake has now been rectified. The galactic community eagerly awaits for you to attain your rightful place as our new leaders.”
With that, the visitor departed. Mankind felt vindicated, but it was ignorant of the fact that the roaming appendage had made a particular strain of intestinal flora self aware; the announcement had been for them.