Joss Whedon has talked about tensions within the Avengers group, but this clip of a knock-down, drag-out donnybrook between Thor and Iron Man goes well beyond snarky remarks and hurt feelings. Comic book fans will find this kind of kinetic settlement of interpersonal disputes reassuringly familiar.Joss Whedon’s The Avengers debuts nationwide on May 4th. The latest tracking numbers have some analyst’s predicting a bigger opening than The Hunger Games or The Dark Knight (see "'Avengers' Tracking Ahead of 'Dark Knight,' 'Hunger Games'").