QA-STA-2: Can I hold onto a branch or other object behind my lie while putting?

Holding on to something behind your lie for support is not prohibited by the rules, provided that the object is in-bounds. It also must not be moved, since you are required to take the stance that results in the least possible movement of obstacles on the course. You are not allowed to hold onto another person for support, as that person is not part of the course.