So, it’s perfectly logical that Los Angelenos gazing into a darkening sky around 5:30 p.m. Friday would assume their city was in the midst of an Alien invasion as they saw this:

Elon Musk, the billionaire entrepreneur who ultimately wants to put people on a space-bound Megabus , fanned the flames by saying on Twitter that the jellyfish-like shape in the sky was a “nuclear alien UFO from North Korea.”

Jan Brewer, whose Twitter profile succinctly identifies her as “Arizona’s 22nd Governor” tweeted that she was wondering what the lights over Phoenix were.

And many, many others pointed their smartphone cameras skyward, capturing what they assumed was the first sign of the alien apocalypse — or something — and musing about the vapory lights in the sky.

And as Musk pointed out in the wee hours of Saturday morning, people along the East Coast can freak out next month.