If you've ever suffered from back pain, you know how debilitating it can be. So it's not surprising that many Canadians are willing to pay thousands of dollars for treatments that promise long-term relief. The latest high-tech, high-priced back pain treatment is called "non-surgical spinal decompression therapy." One of the most popular machines is called the DRX9000, which can pull on your back with over a hundred pounds of force. The Low Back Clinic, one of Canada's largest chains offering this treatment, claims the pull from the DRX9000 separates your vertebrae so discs can be restored. Many Canadians are paying big bucks - up to $5,000 - to get the DRX9000 treatments. But does it really work? Marketplace's Erica Johnson puts the machine to the test and reveals potential hidden dangers you need to know about.