Interruptibility

Interruptable As Soon As Frames, abbreviated "IASA frames," are the period of time at which you can first interrupt an attack with another motion. They usually occur after hitboxes have disappeared. This period of time is often distinct from the amount of time it takes for the attack animation to finish. One attack that particularly exemplifies the concept is Marth's down tilt, which can be interrupted during the vast period of time Marth is retracting his blade, and Young Link's up smash. Perhaps the most notable example is Pichu's right facing taunt, which can be canceled after 60 frames, while the animation takes an entire 100 frames to complete.

Peach can use IASA frames to perform the Vidjo-cancel and Vidjo-drop.

An example of IASA frames in Super Smash Bros.