You can jump through shadows nearly instantaneously.

Prerequisite(s): Improved Shadow Jump, Perform (dance) 8 ranks, 6th-level shadowdancer

Benefit: When you use your shadow jump ability, you may expend an additional 20 feet of distance beyond the distance that you are actually jumping in order to jump as a swift action instead of a standard action. You also may still choose to jump as a move action by expending only 10 additional feet of distance beyond the distance you are jumping, as with the Improved Shadow Jump feat.