I could get lost.
"That’s not Photoshop. The Dutch artist Berndnaut Smilde has developed a way to create a small, perfect white cloud in the middle of a room. It requires meticulous planning: the temperature, humidity and lighting all have to be just so. Once everything is ready, Smilde summons the cloud out of the air using a fog machine. It lasts only moments, but the effect is dramatic and strangely moving."
C to C flat is a diminished octave to the best of my knowledge.