This is beyond terrible! I'm so sad for this girl because it's obvious she had a bright future. A senior gymnast from Auburn University, Alabama, US, broke both her legs and dislocated both knees. Her name awas Samantha Cerio and she was competing in a NCAA gymnastics regional event.
Skip to 39:00 to see it actually happen below... WARNING it is NOT for the faint hearted. You've been warned!