The hell hound snorted and growled as the guisarme blade sliced hard where its bulging shoulder and neck met. It seemed to absorb the force down through its four limbs, bucklign at the knees but not sprawling, and squeezing its head and shoulder alongside the flats of the blade, twisted its body in a gamey and growling attempt to twist Rose off balance.<br/><br/><br/><br/>hell hound's first opposed check: 32 (not tripped)<br/>hell hound's first countertrip opposed check : 22<br/>(if applicable:)<br/>hell hound's second opposed check: 26 (would not be tripped)<br/>hell hound's second countertrip opposed check: 34<br/><br/>Oh I think Rose's initiative is 1 less (b/c of the Enlarge -2 dex), though it doesn't change order in this case.<br/><br/>AFAICT Knock-Down trips still involve the melee touch attacks and (if the subsequent opposed check fails) the target's counter-trip attempts (unless the target being flat-footed precluded that, which I couldn't find that it did). "you [may] make a trip attack as a free action", with those being part of a trip attack (http://www.d20srd.org/srd/combat/specialAttacks.htm#trip). Might be counterintuitive given the name and descriptive/flavor text of the feat. Compare to the wolf's Trip ability (http://www.d20srd.org/srd/monsters/wolf.htm), which specifically excludes the touch attack and countertrip (and the AoO, since it lacks Improved Trip) from the tree post-attack-trip.<br/><br/>However the routine could still be IC conceptualized either as a single point of contact, which its flavor text seems to suggest (sorta like with the extra roll for a threat to crit) or a second point of contact while they reel from the first, (and in this case the touch attacks have only a 5% 'nat 1' failure check, so I just rolled and they hit).<br/><br/>The enemies are flat-flooted and don't have Combat Reflexes, and she's out of their reach, so if the first countertrip goes against Rose, either standing back up, or picking up the guisarme if she chose to drop it instead, wouldn't provoke an AoO (the first attack of a full attack can be 'turned back into' a standard action if the character decides to do so after it). Nice design btw - another nice thing about her being a reach tripper that I didn't realize 'til just now (being more likely to be out of enemy's AoO range).<br/><br/>Or she could continue to attack while prone. The 2nd attack (and melee touch attack) would still hit even with a -4 for being prone herself. She could even try to trip it while prone herself.  The 3rd attack will miss even if the hell hound is prone by then and Rose is not. (Its flat-footed AC is 22).<br/><br/>Being prone might even be an edge in some cases, as it's +4 AC against ranged attacks, and Rose's melee reach often will exceed enemies'(i.e. like baiting them into melee to provoke AoOs).<br/><br/><br/>For handy reference:<br/><br/>Knock-Down [General]<br/>Your mighty blows can knock foes off their feet.<br/>Prerequisites: Base attack bonus +2, Improved Trip,<br/>Str 15+.<br/>Benefit: Whenever you deal 10 or more points of<br/>damage to your opponent in melee, you make a trip<br/>attack as a free action against the same target.<br/><br/>and its errata:<br/><br/>p.7 Knockdown<br/>Insert to end of Benefit:<br/>Use of this feat cannot be combined with Improved Trip to generate an extra attack, and<br/>successful use of this feat does not grant an extra attack through the Cleave or Great<br/>Cleave feats.<br/>Insert may into “you may make a trip attack as a free action.”<br/>After “whenever you deal 10 or more points of damage to your opponent in melee”<br/>insert: with a single attack