Scattered throughout Pacific City, high and low, are glowing green "orbs". These orbs are Agility Orbs, and by collecting these you'll gradually increase the Agility of your character. The more orbs you grab the closer you will be to being able to jump massive heights. As with the other Skills, when you have collected enough Orbs to raise your Agility to 100, your Agility level increases providing you with the ability to run faster, and jump farther. There are 500 Agility Orbs to be found, and even achievements (Free Runner and King of the World) for finding them all.