In 2002, Alex Salas was a carpenter climbing scaffolding at a work site on a wet day in October when he slipped and fell more than 20 feet. He suffered 10 fractures and underwent 13 surgeries, and sued the contractor who was responsible for his injuries. At the first trial in 2006, the contractor was ruled negligent as a matter of law but the jury refused to award any damages to Mr. Salas. At a second trial that ended a few weeks ago, the jury awarded over $2.5 million in damages. Why the difference?