Reach weapon feat question

[Kanaric]

So a friend of mine is building a reach character in the game and there is this feat I saw a while back that when someone makes an AoO it immediately stops the attacked creature in it's place. Anyone know what this feat was called? Can'd find it....

NVM it was stand still and for adjacent squares....

[Flaming Duck]

There's also Pin Down. That works great with reach weapons, but you need fighter levels or equivalent as pre-reqs.