Spiral Arrow

From the Street Fighter Wiki

One Cammy's special moves, Spiral Arrow is performed via a quarter circle forward plus 'kick' motion.

Cammy lunges forward during the technique, spinning in a cork-screw manner with her feet leading towards the opponent. Though the move targets the opponent's legs, the technique can be blocked from both standing and crouching positions. 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 carry frame disadvantage on block except when done at the maximum distance.

The Vs. series of games allows Cammy to perform this move while airborne, an ability not shared in her other game appearances. Flame or 'ki' emphasis is added to the attack in the Vs. series as well. In Super Street Fighter II and Super Street Fighter II Turbo, Street Fighter Alpha 2 Gold, X-Men vs. Street Fighter, and Marvel vs. Capcom 2, this technique is called the "Cannon Drill".