One reason Steven Soderbergh's new thriller 'Contagion' seems so scary is that its depiction of a worldwide viral pandemic seems all too plausible. That's no accident; Soderbergh and screenwriter Scott Burns made a point of consulting with actual scientists to make sure their movie stuck close to a realistic scenario. Of course, consulting with scientists takes filmmakers only so far down the path of realism. Even in 'Contagion,' there is some dramatic license taken, some science that is fudged for dramatic purposes. (That's the case with all bio-horror thrillers whose big bad monsters are microscopic viruses.) We looked at several viral scarefests to see how they stack up scientifically. The results may surprise you.