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Explosion of several heavy clouds moving from left to right and defocusing in background in 4K -
Controlled smoke creating heavy clouds from left to right on dark background in 4K -
Soft smoke moving slowly drawing thin lines and waves on dark background in 4K -
Heavy smoke in lower section of the scene moving slowly in darkness in 4K -
Soft transparent smoke moving slow exposed by the light in darkness in 4K -
Soft smoke moving slowly in lower section of the scene with dark background in 4K -
Heavy cloud of white smoke moving from the right creating a texture of lines and swirls in 4K -
Heavy cloud of moving slowly from the right creating soft lines and spirals in 4K -
Soft smoke cloud going down and up exposed by light ray in 4K -
A lab worker pours liquid nitrogen