Mark Ruffalo portrays real-life San Francisco detective Dave Toschi in Zodiac (Paramount, 3.2), and obviously bears a certain resemblance to the real guy in his prime. But one thing an actor playing a cop in a big-studio movie can never have is a little funny-looking pot belly, like the real Toschi had.

Mark Ruffalo (l.) in Zodiac; Dave Toschi in the ’70s or early ’80s.

Zodiac director David Fincher was a major hard-core accuracy freak in 10,000 different ways when he planned and shot this awesome film, but no director would dare suggest that a “name” actor wear a prosthetic pot gut, and no actor would stand for it.