Well, this is freaky. There's video of what appears to be a city, floating in the clouds above Foshan in China’s Guangdong province.

The mysterious cloud city only appeared for a few minutes before disappearing completely.

Meteorological experts claim that it was just a mirage. Others say that it could be the result of a possible blue beam test (hologram). And still others say that it could be a temporal vortex (aka a possible parallel universe materializing briefly into our own reality!).

What do YOU think it was?

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