Improved Trip as part of Aoo

[Hypersmurf]

Why standing up if you are not prone? Sitting?

No, he means:

If you are Prone, and take the Stand Up From Prone action, and provoke an AoO, what is your status at the time the AoO occurs?

Do you still have the Prone condition, in which case you suffer an AC penalty, but in theory cannot be Tripped again?

Or do you no longer have the Prone condition, in which case there's no AC penalty, but you can be Tripped?

It has to do with exactly when AoOs take place in relation to the triggering action

-Hyp.