http://us.battle.net/d3/en/item/hexing-pants-of-mr-yan
Your resource generation and damage is increased by 25% while moving and decreased by 20–25% while standing still.
I'm wondering whether it works for Demon Hunter's Sentry skill, or similarly Wizard's Hydra skill. I mean, can I just put Sentries/Hydras on the ground and then start running around them to make them deal 20-25% more damage, whether I'm moving or not when I cast the skill? Or I just need to be moving when I cast the skill to enjoy the damage boost for the whole duration of Sentries/Hydras , whether I keep running or not after casting? Or I need to both be moving when casting and keep running after casting?