A woman claims a Fitbit exploded on her wrist, which is more reason to avoid getting in shape

A woman in Wisconsin said her Fitbit exploded on her wrist, causing second-degree burns and prompting her to get up and move for all the wrong reasons. 
Dina Mitchell told ABC News in an email she had only been wearing her tracker, the Flex 2, for about two weeks when it burst into flames while she was reading last week. She didn't report any prior issues with the device or its lithium-polymer battery, which was presumably the cause of the explosion. 
"It was either defective or really