Porn star Molly Cavalli was filming an underwater scene in a shark tank when she was bitten in the ankle. Video shows her screaming and trying to get away from the shark as blood filled the water. Her ankle injury required 20 stitches, but she seems to be okay.
Link to article and video:
http://www.dailymail.co.uk/news/article-4477488/Porn-star-cries-agony-a10ft-SHARK-bites.html