Quote Originally Posted by dspeyer View Post
A counter wouldn't be nearly as useful. That would protect you against one AoO. If you're surrounded and trying to get out, you need to avoid many.
A counter can last through multiple AoOs; there's no hard-and-fast rule as to what a counter has to protect against. It is fairly standard, however, that a counter is reactive and a boost is proactive, so if you're going to activate something to negate AoOs it should really be classified as a counter.