friday night sky. >> wow, what is that? >> reporter: the sight so mesmerizing that some motorists couldn't keep their eyes out of the sky and on the road. >> oh! [ bleep ]. >> this guy's not paying attention. >> reporter: and even after those three cars crashed, the narrator in this video barely skips a beat, he just keeps talking about that shape in the sky. >> wow. what is that? >> reporter: the rocket's unusual, whale-shaped contrail feeding a frenzy. >> if you're wondering that bright thing in the sky was the missile launch. >> reporter: and so many were wondering. >> no, dude, what is that? >> reporter: so many didn't get the message that the hash tag aliens trended on twitter. calls flooded tv stations with ufo sightings. and the man who created the mess? elon musk jokingly capping it this way -- "nuclear alien ufo from north korea." now, the next falcon-9 launch isn't until later next month.