The Spiral Arrow (スパイラルアロー Supairaru Aroo?), called the Cannon Drill (キャノンドリル Kyanon Doriru?) in certain games, is one of Cammy's and Decapre's special attacks in the Street Fighter series, introduced in Super Street Fighter II. The move is also usable by fellow Doll Juni in Street Fighter Alpha 3.
The technique hits once and causes knockdown on hit. In some incarnations, Spiral Arrow will hit twice from the appropriate range. The move tends to be very unsafe on block, except when done at the maximum distance. In its EX Special version, introduced in Street Fighter IV, the "drilling" motion hits twice and passes under projectiles (excluding Sagat's Low Tiger Shot).
Certain crossovers allow Cammy to perform this move while airborne, with flame or 'ki' emphasis added.