<div class="quoteheader"><div class="topslice_quote">Quote from: Wizards, errata for sword and fist</div></div><blockquote class="bbc_standard_quote">Use of this feat cannot be combined with Improved Trip to generate an extra attack, and successful use of this feat does not grant an extra attack through the Cleave or Great Cleave feats.<br/></blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>So, you don't get a free attack for tripping a target with this feat, and you don't get a free trip when cleaving.