Full: Interrupts the target foe's action. If that action is a skill, that foe and all nearby foes are knocked down for 2...4...4 seconds. (50% failure chance with Fast Casting 4 or less.)
Concise: Interrupts an action. Interruption effect: if the action is a skill, causes knockdown for 2...4...4 seconds on target foe and all nearby foes. 50% failure chance unless Fast Casting 5 or higher.