There are times when you want a body to balance (standing without support, maybe in an ice-skating or dancing position), and times when you don't (hanging on to a tree root on the cliff face while reaching for that plump strawberry where the dynamic of reaching is part of the message). As implemented in Poser 4 and ProPack it is pretty crude (I never tried it in P5). Being able to customize it would be very useful for non-standard characters such as dinosaurs or wolfmen or even housecats and squirrels... where the tail IS a tool for balancing. Depending upon how well it works, cartoonists and animators might be able to give the tail enough weight so that jumps and landings looked right. Carolly