By: Addison Wylie Down River has so much emotion in it, the film is almost bursting at the seams to contain all of it. Actor turned filmmaker Ben Ratner pushes his four lead actresses to the brink of hysteria, but for fathomable reasons.  Harper (played by Colleen Rennison) struggles as a lowly musician who’s losing touch of her sexuality, Fawn (played by Corner Gas’ Gabrielle Miller) is an actress who’s feeling a disconnect between her…