Just to clarify... it's the failed concentration attempt due to damage taken (from the sucessful AoO) that may prevent casting... not a sucessful AoO all by itself.tauton_ikhnos said:Spells have a rule stating that an AOO (of ANY sort) can prevent the casting. Grappling has a similar rule. Getting up has no such rule. Thus, an AOO, in and of itself, does not prevent getting up. An AOO, in and of itself, DOES prevent casting or initiating grappling.
Mike