You have a chance to dodge attacks that would hit you, but at a cost.
Prerequisites: Dodge, Tumble 4 ranks.
Benefit: You may activate this feat as a free action. You gain a +2 dodge bonus to your Armor Class for the rest of the current encounter. At the end of the encounter, you are fatigued.
Source: Savage Species, page 31. Changed the unnamed bonus to a dodge bonus. Changed the description of the feat slightly for better accuracy.