February 17, 2009 11:18 pm Turn Your Boring Workout Upside Down Crunch gym has a new class that takes cues from the worlds of circus, dance and entertainment to making working out more fun. US & World Videos 1:26 What is botulism? 0:29 At least 30 sloth fever cases reported in people traveling from Cuba to Florida 1:32 How to prevent mosquito bites 1:16 FDA approves new blood test to detect colon cancer 4:57 Everything you need to know about IVF