Heavy item falling from the sky in some classic cartoons

ANVIL

Think of the flat, metal object Wile E. Coyote often drops on Road Runner.

This clue refers to the classic cartoon gag where a massive anvil drops out of nowhere onto a character’s head—usually in Looney Tunes or Wile E. Coyote skits. The word "heavy" hints at the anvil’s weight, while "falling from the sky" directly ties to the slapstick trope. It’s a playful nod to how anvils became a symbol of exaggerated cartoon misfortune.