Fast, sharp aluminium or tin foil movement, crackle and rustle.
Aluminum scraping on cement
Rock salt being poured on to metal surface.
A small rock dropped on to metal. Rattle, light impact.
Sand or gravel, falling on thin light metal surface.
Dirt scrape, soft aluminum sand box
Rock salt poured onto an aluminum gutter.
messing around with a metallic object, rattling and high-pitched, metallic sound.