Executed by performing a quarter-circle forward? motion and pressing kick, C. Viper performs a jumping flame kick similar to Guile's Flash Kick. The medium and heavy variants hit twice, while the light variant hits once. The EX variant has invincibility throughout, and Viper will follow up with a Burning Kick; the second hit can be cancelled by pressing two kick buttons.
The move overall works best as an anti-air, and the light variant has very little (if any) startup time, making it very useful for reversals.