|All appearances||+ (forward jump only)|
DescriptionEditExecuted by pressing a quarter-circle backward motion and kick during a forward jump, Cammy/the user performs a stylish focused turning motion into a diagonal down-forward one-legged driving kick with deadly force. There is negligible difference between Cannon Strikes using different kick buttons. Prior to the Street Fighter IV series, the move could only be used at the apex of a forward jump.
In the crossover games, the attack could knock down on even on grounded hit and possessed a "Psycho Power" effect on Cammy's leg. It also made Cammy dive down at a much faster speed, though she will not dive fully all the way towards the ground as the move may stop mid-way depending on how high she's jumped. This trait carries over to Street Fighter IV, where Cammy also dives down slower than before compared to previous games.
The EX Special version introduced in the Street Fighter IV games has Cammy use both legs for the kick in the style of a drilling dive, and can be executed during any kind of jump, not just a forward one.
This move is a solid crossup tool, and good choice for closing in through the air or to quickly punish a whiffed attack especially on counter hit. However, if performed too high, the move may hit too early before the user recovers, making it less effective and very easy to punish. This is quite true for the Street Fighter IV series incarnation where Cammy doesn't dive down as fast and the move does not exactly last all the way to the ground.
Mainly as of Street Fighter IV's removal of a specific height restriction, this move is now most effective when performed as close to the ground as possible (with proper spacing based on the starting height). The EX version can also confuse and catch foes by surprise in this regard, and its input can even be "Tiger Knee'd" for better results (via quarter circle back-to-back-up).