Changes into

When its hit points run out it becomes Yellow Empty Shopping Cart.

Drops when destroyed

When it collapses

Falling, it leaves Scrap Metal Pile (75% of the time) where it lands.

Loot

Holds the Shopping Cart loot container: 6 × 2 slots, 42 possible items.

Chance of at least one per open at loot stage 50. Every item and stage.