UFOs?
No, lamps reflection on a window, taken from:
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UFO?
No, mikrocopter/quadrocopter!!
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UFO?
U.F.O Bizarre clouds filmed over Moscow. October 2009
No, very uncommon cloud formation called "hole-punch clouds".
They are usually caused when an aircraft intersects altocumulus or cirrocumulus clouds.
Altocumulus are high-altitude clouds, usually white or gray in color, that occur in sheets or patches. Cirrocumulus also are high-altitude clouds made
up of supercooled liquid water droplets and ice crystals.
An airplane passing through a mixed cloud layer while ascending or descending could disrupt the delicate coexistence between the ice crystals and the
supercooled liquid water droplets, causing a hole to be punched in the sky.
Small-scale atmospheric movements, both up and down, caused by the jet stream, could cause a similar phenomenon.
SOURCE
SOURCE
SOURCE
NOTE:
In the
original video , the sky brightness behind the darkest clouds create this striking
contrast.
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UFO?
No, Spikey hot air balloon!
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To be continued......