The tendency of fight scenes involving an Extraordinarily Empowered Girl or Action Girl to also feature her doing impractical backflips, gratuitous somersaults, and gymnastic cartwheels to approach or evade her opponent.
Appears to be descended from "wuxia"-style martial arts action found in Hong Kong action films, though it may just be an excuse to show her body from every angle.
Other than [...] [tvtropes.org]