I once had a terrible crush. Yup, my liver was busted wide open as my body was crushed on a construction site accident. I was the boss, so I wouldn't let the guys call the ambulance. By the time I finally gave in and triage at Metro analyzed my condition after life flight, they found that a blood clot was holding my liver together and it would heal that way.
Had I been a whimp or maybe just a little bit smarter and they would have cut me open to sew my liver back together, I WOULD HAVE WANTED MY SPIDER SILK! OH YEA!