Every so often, an overly confident filmmaker comes along to lighten the mood around taboos.  There was Josh Lawson’s comedic approach to bizarre sexual fetishes in The Little Death, then Dave Schultz’s tasteless handling of suicide and death in Considering Love & Other Magic, and now Stephen Wallis with Defining Moments, an exhausting flume of individual stories dealing with heavy subject matter (like mental health) and the writer/director’s unbearably quirky perspective.