Quick Spin Knuckle (アクセルスピンナックル Akuseru Supin Nakkuru?), also known as the Axel Spin Knuckle, is one of Cammy's special attacks, introduced in Super Street Fighter II: The New Challengers. The move is also part of Juli's arsenal in Street Fighter Alpha 3. In Street Fighter V, it is her V-Skill.
Cammy approaches her opponent by hopping into the air and spinning her back around to the opponent before whipping her fist a full 360°. If she connects with this move up close, she can hit twice - first with her elbow, and next with her fist (via her standing heavy punch animation). In the Marvel vs. Capcom crossovers, Cammy engulfs her fist with Psycho Power.
While performing this move, the user will evade most attacks, save for ones that connect with her head; however, it typically has a lengthy startup time. Quick Spin Knuckle can also go through fireballs and be canceled with the Spin Drive Smasher in Street Fighter IV (in which is also her Armor Break).
In Street Fighter V, this move is much more vital to her offensive game due to the new ability to be able to cross-up her opponent with the forward leap.