I don't think that there is any hard and fast rule that says that documentary has to be linear at all.
Brian LindstromIn documentary you sometimes see the tyranny of the linear, but what I've noticed in the last ten years in narrative film is the tyranny of the non-linear.
Brian LindstromIt can be difficult to present mental illness in film without resorting to devices that, if not handled well, can seem heavy-handed or clichรฉ.
Brian Lindstrom