How to Move and rotate pole vectors in Maya 8.5
Take a gander at this 3D animation video tutorial on how to move pole vectors in Autodesk Maya 8.5. So, if you need to move that pole vector so it doesn't flip, and see where to put it if you want to let your character do the split. Also see how to rotate the pole vector in Maya. Your 3D modeling skills need it, trust me.