On April 7, when Britney Spears and Kevin Federline realized that their baby, Sean Preston, had been sleeping more than usual, panic bells went off. Just six days earlier, the 7-month-old had taken a major fall from his high chair, a tumble that had his parents worried that he might have been critically injured. They had every right to fret. After rushing Sean to a nearby hospital, they discovered he had a minor skull fracture (sometimes called a "scalp fracture" in babies), and a blood clot. And the doctors weren't the only ones to take notice! The next day, the...