Mighty Leaping( Savage Species, p. 37)
You have developed your leg muscles and trained yourself to make mighty leaps.
Mobility (PH) , Jump 9 ranks, STR 21,
You gain a +10 competence bonus on Jump checks. If you intentionally jump down from a height, a successful Jump check (DC 15) lets you take damage as if you had fallen 20 feet less than you actually did.
A creature with this feat is not limited by its height when jumping.
Without this feat, a successful Jump check lets you take damage as if you had fallen 10 feet less than you actually did.