Casey Affleck is a rare animal. For a decade, Hollywood's ecosystem has favored actors buff enough to star in one action franchise per year. To compete, Affleck's brother, Ben, and best bud, Matt Damon, have pumped up like gorillas to play Batman and Jason Bourne, respectively. These steroidal alphas still consider themselves serious actors, but the side effect is that they seem increasingly ridiculous in serious roles. It's getting harder to look at Damon's six-pack — or at Mark Wahlberg or Chris Hemsworth or The Rock or even Brad Pitt and Tom Cruise — and think, "That is an ordinary man."