cascade

Rush down in big quantities, like a cascade.

Arrange (open windows) on a computer desktop so that they overlap each other, with the title bars visible.

A sudden downpour (as of tears or sparks etc) likened to a rain shower.

“a sudden cascade of sparks”

A small waterfall or series of small waterfalls.

A succession of stages or operations or processes or units.

“progressing in severity as though a cascade of genetic damage was occurring”

“separation of isotopes by a cascade of processes”