When this guy signed up for the CrossFit challenge, he didn't know quite what to expect. Rather than lifting weights or doing burpees, he couldn't talk about his favorite thing in the world.
If you've tried every diet and exercise regimen out there and nothing has worked, maybe it's time to try something new. Something like giving up.
There's parkour...and then there's subparkour. You probably shouldn't try either at home.
No exercise method is safe! Even yoga has its dangers.