A man has filed a lawsuit against a Florida YMCA and a sporting goods manufacturer for injuries suffered when the exercise ball he was using suddenly burst, reports the Florida Times-Union.  The man told the Florida Times-Union that he leaning back on the ball and lifting weights when the ball exploded. He later underwent 5 surgeries. The lawsuit contends that the ball was erroneously labeled as an "anti-burst" ball, and that it was specifically claimed to slowly deflate instead of explode.