Very lucky, that the Game Manual version of Prone does not apply in game "While prone, you are considered flat-footed and lose your Dexterity bonus to AC. Additionally, anyone who attacks you receives a +4 to hit." If Knockdown made you flat footed, a number of builds would be just obscenely powerful (unopposed sneak attacks for nearly a whole round, with +4 and every 2 rounds) Ragimund (talk) 07:13, December 7, 2018 (UTC)
"In DnD, standing up from prone position provokes an Attack of opportunity, in NWN2 this is not the case." You can still get AoO's from a prone target's, it's just not easy. If you have longer reach and are just outside your opponents reach when they recover from prone, their move towards you may provoke an AoO. (AoO's aren't reliable on the best days). Ragimund (talk)