Passing Trick (Combat)Source Ultimate Combat pg. 112 Slipping past a foe gives you the chance to feint.
  Prerequisites: Int 13, Combat Expertise, Dodge, Improved Feint, Mobility, size Small or smaller.
  Benefit:  Whenever you make a successful Acrobatics check to move through an opponent’s space, you can spend a swift action to make a Bluff check against that opponent to feint in combat.
  Special:  If you have the Underfoot feat and the opponent is larger than you, you gain a +2 bonus on the Bluff check this feat allows.Source Pathfinder Unchained pg. 128 You can spend 5 stamina points to attempt a Bluff check as a free action instead of a swift action when using this feat.
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