Felling Smash: what is my attack bonus on the Trip?

[Saros Palanthios]

The Felling Smash feat says that when I make a single attack (with Power Attack) and hit, I can also attempt a Trip combat maneuver as a Swift action.

My question is, what BAB should I use for the swift-action Trip? Should it be my full BAB like an AOO? Or should it be reduced by 5 like an iterative attack?

[RAWmonger]

Bonus attacks are always made at your full BAB, unless otherwise specified. You do, however, still take the penalty from power attack on this bonus attack, even if you have Furious Focus.

[Saros Palanthios]

Wow, that means Felling Smash is even more useful than I thought! Thanks.