Tumble

Characters with high tumbling skill are able to roll away from attacks during combat, positioning themselves safely at all times. Anytime the character might receive an attack of opportunity for moving past enemies, they will automatically attempt a tumble check against a DC of 15. If successful the attack is avoided. For every 5 ranks in this skill (not including Dexterity bonus) the characterâ€™s AC is also improved by +1.
 * Ability: Dexterity
 * Classes: All
 * Requires Training: Yes
 * Check: DC 15 to avoid attack of opportunity while moving.
 * Use: Automatic