DOne it all. Herniated the L5 disk at age 23, lost my right leg until the nerve could be released, 2 years later, slipped on ice(live at 11,700') landed on ass. really messed up L4 and helped L5 again. fixed it with surgery. Great for 10 year, 2005 came along and ruined it good do to weight gain and lack of excersize. got it cleaned up a little in april and August(amaizing how bad a sneeze can fuck you up when you are trying to recover fromback surgery). Now two years later I was just stretching my vert like an acordian and it felt great, but when all the weight was applied back to the spine, shit didn't go back the way it should of and pinched something and locked for a while. layed me out on the floor for 18 hrs wimpering and having my animals hovering over me licking my head.