Feng Shui: The Lost Island
Synthetic Musculature (Agl 11, -2 Con)
Your muscles have been replaced with a synthetic substance that reacts better to nervous impulses (or, if you already have robot limbs, these replace the standard, clunky hydraulic systems in them). These offer you superior muscle control, allowing you to do the sorts of flips and jumps that Jackie Chan only dreams about. Of course, it takes more energy to contract the synthetic muscles, so you do tire more easily.