Something straight out of Mortal Kombat 2 happened in China. Seemed to me like the scene where the Earth realm was being sucked into the Netherrealm. That being said people observed a “floating city”.
Thousands of people witnessed what looked like skyscrapers popping out from gathered clouds in two separate sightings. The first appeared over Foshan in the Guangdong province of China. A few days later, another cloud city appeared over the Chinese city of Jiangxi. Many believed this was a window to a parallel universe, but weather experts said it was a known type of optical illusion. “Fata Morgana” is a type of mirage that distorts objects in the distance, and can be seen at land and sea.
“Fata Morgana” is caused by light bending through various layers of temperature as it makes its way from the sun to the earth.
In calm weather, a layer of significantly warmer air can rest over colder dense air, forming an atmospheric duct which acts like a refracting lens, producing a series of both inverted and erect images.
Despite this explanation, conspiracy theorists have been found a lot to latch onto with the floating cities. I’m still waiting for Chitauri to bust out, zooming around and junk.