I've had a bad back for years too. But it comes and goes. Several years ago I was bear hunting in NC PA and was lucky enough to shoot a decent boar. My back was doing really well. That is up until I rolled him over to start to dress him out! Then POW - I pulled it out. Both me and the bear laid there for a good hour before I could finally move again. Luckily it was all downhill and when I got close enough I called one of the gang on the radio to come load us both on the truck!