Sidestep

(Miniatures Handbook, page 28, DnD 3.5)

[General]

You can move nimbly around the battlefield.

Prerequisite

Dodge, Mobility, Tumble 8 ranks, DEX 15

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.