Overshot and overrotated on my first day jumping season before last...
Kidney split into 5 seperate pieces, collapsed right lung which over 2 pints of fluid was drained from via a very large syringe through my back, serious internal bruising, severe concussion, broken ribs.
2 weeks in the ICU, and I had to have a stint put into my bladder... So it was very painful to piss for MONTHS. And my urine was bloody until the end of that winter.
Great stuff.