The Olympic opening ceremonies are tonight. It's time to watch the fastest, strongest, fittest people from around the world throw things and themselves as far as they can. And sometimes when you're really pushing yourself, you'll wind up contorting your face into a terrifying bug-eyed, loose-lipped, puffed-cheek horror straight out of a child's nightmare. Here's 15 pictures of athletes that are stronger than you'll ever be, looking stupider than you'll ever look.