Source: Player's Handbook II
Your excellent athletic ability and superior conditioning allow you to make near-superhuman leaps.
Prerequisite: Jump 4 ranks.
Benefit: When making a Jump check, the DC for the check doesn't double if you fail to move 20 feet in a straight line prior to jumping. If you do move 20 feet in a straight line before attempting a jump, you gain a +5 competence bonus on your check.
Normal: All Jump checks require a 20-foot running start to avoid doubling the DC of the check.