Meaning of "sky-flying"?

"Flying in the sky" is an adjectival phrase used to describe many things suspended in the air, like raindrops, flower petals, snowflakes and so on. It means a large number of objects floating or fluttering in the air, dense and spectacular. This phrase is often used to describe natural phenomena, such as "snowflakes flying in the sky", "cherry blossom petals flying in the sky" and so on. It can also be used to describe other scenes, such as "paper flying", "fireworks flying" scene.