I Love You Man Film Trailer

In this trailer for the film I Love You Man, Jason Segal leaves his dogs droppings in the middle of the Venice beach boardwalk.

A jogger steps on it and tells Jason to pick up after his dog. Jason then intimidates the jogger by screaming in his face and says, Society tells us to act civilized but the truth is were animals and sometimes youve got to let it out. He convinces Paul Rudd to let it out as well.

How is this clip an example of the catharsis theory? What is another, possibly more constructive way to vent anger?