I have personally seen one live an hour that was double lunged. I didn't shoot him but I was close enough to my buddy to hear the arrow hit. I helped track the deer (still alive when we found him trying to get up but couldn't) and helped skin the deer and he was double lunged. I had another guy that I have a tremendous amount of respect for tell me a similar story. Beileve it or don't believe it but I have seen it. Most of my double lung shots have ended inside of 100 yards but I have had a couple stretch it out. We can't put everything in a box and say this always happens or that always happens because honestly there is never a never and never an always! 99.99% are gonna die quickly but that .01% of the time things happen that we just can't explain. Had I not seen it personally I may have a different opinion.............but I have.