Hypersmurf said:
The Attack Action is a standard action. An AoO is not the Attack Action.
-Hyp.
It;s not quite that simple. Here are some quotes from the PHB:
"Making an attack is a standard action."
"...you must make a full attack action to get your additional attacks..."
(Many other references to "full attack action" - these go to show that the word "action" is sometimes used in more than one way. It would be more proper to say "make a full attack to get..." as it is a "full round action." If the ONLY "actions" were Standard, Move, Full and Free, there there could be no such term as 'full attack action'"
"A creature with a gaze attack can actively attempt to use its gaze as an attack action..."
COMBAT EXPERTISE [GENERAL]
Prerequisite: Int 13.
Benefit: When you use the attack action or the full attack action in melee...
SHOT ON THE RUN [GENERAL]
Prerequisites: Dex 13, Dodge, Mobility, Point Blank Shot, base attack bonus +4.
Benefit: When using the attack action with a ranged weapon...
From the Monster Manual:
Attack
This line shows the single attack the creature makes with an attack action...A creature can use one of its secondary natural weapons when making an attack action...
Flight (Su): A rast can ... (either a move action or an attack action) each round.
There are more, of course.
What I am pointing out is that the word "action" is imprecise, as is the term "attack action." It may or may not mean a standard action, depending upon usage.
So, what does it
[really mean when the book says "no actions" when stunned? Good question
I think they really meant you can't act, which is to say you may marginally defend yourself (note the penalties) but that's about it. Any other interpretation leaves one wondering about why the doid not address other penalties - for surely you could take do anything without some sort of penalty.
The answer, is, of course, that you can't do anything so it's not an issue, and that's why it's not in the rules.
But I am well aware of the legitimacy of the counter arguments. It's left up to DMs to make the right call.