Posted this in another thread. By clipping the tiny black tab on the black part of Blurr's knees, you can give him double jointed knees. You have to remove the three screws on the lower leg and lseperate the two halves of the lower leg. Then, loosen the screw in the knee. You will see the black tab on the black part of the knee. Clip that tab off. That's the only mod you need to do. It makes far reeeeeally nice, dynamic running poses. (oh, bugger. Posted in the wrong forum.)