First appearance: Act 2

Sailor Moon's tiara can turn into a boomerang that Sailor Moon throws at her enemies. It doesn't seem to do very much though. This attack involves some obvious camera cutting, first when the tiara turns into the boomerang, and then when the real boomerang is replaced by the CG boomerang that she throws.

Anime/Manga Comparison:
This is based on the manga attack "Moon Frisbee" (renamed to "Moon Tiara Boomerang" in the current rerelease of the manga), where the tiara becomes circular rather than boomerang-shaped. In the anime this attack was renamed to "Moon Tiara Action", and the tiara turned into an energy disc. In both the anime and manga, this was used as a finishing attack, as opposed to the live action series where it's really quite useless.