Knockback feat

[Creeping Death]

Question about the knockback feat found in Races of Stone, I think it is Races of stone. Basically if you power attack someone you get a free bull rush attempt, if you succeed, they move back 5 feet, you do not move with them. The feat does not say that the target is knocked prone, so we rule they are not.

Let's say we have this scenario:

Tank Orc 5' space Rogue

Tank hits orc and successfuly knocks him 5 ft into a scare that is threatened by the Rogue. Does the Rogue get an AoO?

Also, what happens in these other fine scenarios?

Tank Orc Orc
Tank Orc Wall
Tank Orc Window

Each time the tank knocks the orc to the right either into another orc, a wall, or a window (easily breakable obstacle or barrier).

Thanks,

 

[Peter Gibbons]

Tank hits orc and successfuly knocks him 5 ft into a scare that is threatened by the Rogue. Does the Rogue get an AoO?

From the Bull Rush rules: "The defender provokes attacks of opportunity if he is moved."

Looks like the rogue would get an AoO.

Also note the rules for accidentally ending your movement in an illegal space (like, say, one occupied by a rogue): PHB, p.148.

 

[shilsen]

Tank hits orc and successfuly knocks him 5 ft into a scare that is threatened by the Rogue. Does the Rogue get an AoO?

Yes, as Peter Gibbons said above. Note that the orc needs to be knocked out of a space threatened by the rogue. You draw an AoO for leaving an threatened space, not entering it.

 

[Mistwell]

There is an exception for Attacks of Opportunity in the Knockback feat, though I do not know if it is relevant for this question. Here is the full text of the feat, in case it is helpful:

Feat Name: Knockback
Feat Source: Races of Stone by Wizards of the Coast
Prerequisites: Improved Bull Rush, Power Attack, size large or larger (goliaths qualify by virtue of their powerful build racial trait).
Benefit: If you score a hit while you are using the Power Attack feat, you can make a free bull rush attempt against the foe you hit, applying the number by which you reduced your attack roll as a bonus on the opposed Strength check (as well as on the damage you deal). If you hit with a two-handed weapon, you can apply double the number on the opposed Strength check. Unlike standard bull rush attempts, knockback attempts don't provoke attacks of opportunity, and you don't move with the enemy you knock backward. Bul rush rules can be found on page 154 of the Player's Handbook.
Special: A fighter may select Knockback as one of his fighter bonus feats (see page 38 of the Player's Handbook).