Feat of Strength

Feat of Strength
You draw on inner reserves of physical power to perform great feats of strength, such as lifting heavy objects, leaping great distances, or hauling yourself up a cliff while weighted down by a heavy load.
Prerequsites: Strength 15
Benefit: Once per encounter as a full-round action, you can take 20 on a single Strength check or Strength-based skill check (you must be trained in the skill), even if you are distracted or threatened.
Normal: You may not take 20 when distracted or threatened, or in a single round.
Special: After using this feat for the first time in a given encounter, make a DC 15 Endurance check (as a free action). If the check succeeds, you can use this feat once more during the same encounter.