Sylvan Nimbleness (4e Feat)
From D&D Wiki
Sylvan Nimbleness [Racial]
You can use forested undergrowth in your favor, swinging around branches and ducking through brambles to avoid your enemies' pitfalls
Benefit: If you are subjected to forced movement while in forested terrain, you may shift one square in a direction of your choosing as a free action immediately after the forced movement has been resolved.