You can move nimbly around the battlefield.
Prerequisites: Dex 15, Tumble 8 ranks, Dodge, Mobility.
Benefit: Once per round, when you make an attack of opportunity, you may take a 5-foot step after you attack. This 5-foot step doesn’t count against your limit of one 5-foot step per round or against any movement you take on your turn.
Source: Miniatures Handbook, page 28.