Sometimes, when a strong creature hits someone, they take an impromptu trip across the battlefield. The telekinetic blast of a powerful psionic can throw his enemies for a loop as well. This is called “knockback”.

When a target is hit by a creature with superhuman strength or a power that deals Bludgeoning, Force, or Thunder damage, there is a chance he’ll be knocked backward. Use the following rules to clarify.

Dealing a Knockback. Typically, in order to knock back a target, you must have a Strength score of 20 or higher, Great-Strength or better, or a power with a total power attack modifier of +5 or greater that deals bludgeoning, force, or thunder damage. You must then make a successful attack with a -5 penalty. If the target is your size category or smaller, there is a chance of knockback.

There are specific powers which can trigger a knockback as well.

Your attack deals damage as normal. The target must then make a Strength save opposed by your Strength (Athletics) check or power check, depending on the nature of the attack. If you win, you knock the target back your Strength modifier or power ability modifier x 5 feet and it lands prone. If the target succeeds at its saving throw, there is no knockback.

If knockback is used against inanimate objects, the target receives no save.

Crashing. There is a threat of damage from landing and crashing into objects and creatures along the path. There is a 50% chance that the target will crash into an object in his path. If the object covers the path entirely, the chance is 100%. Crashing into an object causes damage equal to half the damage taken from the attack to both the target of the knockback and the object it smashes into. Creatures in the path may make a Reflex save (DC 10) to avoid the target suffering knockback.

If the object is broken or destroyed, the creature continues along their path, losing 5 feet from the total distance. The creature may continue to crash through additional objects in the same way.

If you have Super-Strength, the distance of the knockback is doubled. If you have Mega-Strength, the distance of the knockback is tripled.

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