Um, buckle up, because this is a lot to process. A 20-year-old dude from Florida just won a $450 million jackpot, which, according to ABC, is the "fourth-largest jackpot in Mega Millions lottery history." Let us repeat. 450 MILLION. 20-YEARS-OLD. Okay, sorry. We're done (for now). Shane Missler of Port Richey, FL...