I was helping them tear down a playhouse in their yard, when the roof started collapsing. I managed to get out from it landing on me, but when I fell, I suffered a compression fracture of my L3 vertebrae. When X-rayed, I was also told that my bone density is too little for my age. So maybe early onsite osteoporosis. Go in for an MRI tomorrow to see if there are any bone fragments floating around. I must say, I find this backbrace/walker combination worse then anything the Inquisition came up with.