Skywalkers who draw in the air

What is the most abstruse form of artistic expression you've ever seen in your life? Ballet? Abstract art paintings? Or modern popular performance art? My answer does not belong to any of the above. The most profound art I've ever seen is in the sky! Darting between clouds, sometimes flying in formation, sometimes crisscrossing and changing positions. The most spectacular moments are when several airplanes simultaneously use the colored smoke emitted from their tails to create those grand pictures in the sky! At thousands, or even tens of thousands of feet in the air, isn't this art considered the "highest" realm?