iTunes has debuted the sixth clip from Marvel's The Avengers, titled "Face Off," featuring an old-fashioned comic-book brawl between Robert Downey Jr.'s Iron Man and Chris Hemsworth's Thor. The latest peek at the Joss Whedon-directed film arrives just a day after "Loki Imprisoned," which showcased a tense exchange between Samuel L. Jackson's Nick Fury and Tom Hiddleston's god of mischief.

Opening May 4, The Avengers also stars Chris Evans as Captain America, Mark Ruffalo as the Incredible Hulk, Scarlett Johansson as Black Widow, Jeremy Renner as Hawkeye, Clark Gregg as S.H.I.E.L.D. Agent Phil Coulson, Cobie Smulders as S.H.I.E.L.D. Agent Maria Hill and Stellan Skarsgård as Dr. Selvig.

Marvel Studios presents in association with Paramount Pictures Marvel’s The Avengers — the Super Hero team up of a lifetime, featuring iconic Marvel Super Heroes Iron Man, The Incredible Hulk, Thor, Captain America, Hawkeye and Black Widow. When an unexpected enemy emerges that threatens global safety and security, Nick Fury, Director of the international peacekeeping agency known as S.H.I.E.L.D., finds himself in need of a team to pull the world back from the brink of disaster. Spanning the globe, a daring recruitment effort begins.