Clearly the stickies have not made it obvious enough, I will quote this for you.
Originally Posted by
srrwb
while this suggestion can technically be quickly dismissed under the guidlines listed in the " do not make these suggestions" stickey, that seems to be quickly ignored, due to that fact I am posting it here, and now for all to see easily: DO NOT POST SUGGESTIONS THAT INVOLVE A CHANGE IN THE WAY A JOINT MOVES
This includes: new ways joints bend rather than force/relax, new joints, joints having different ways they move under force/relax. This has been suggested infinity billion times, and will no longer be tolerated.
Threads involving new joint suggestions will be promptly deleted locked and shamed. That is all
Etc...
Basically, if you want to make "sweet" replays, either go to the mods section and get a mod that suits you, or simply practice.