I had a friend in high school who's father survived a skydiving accident "breaking every bone in his body." What made the biggest impression on me was that not only did he have to recover physically, but he had to deal with inability to work and medical bills leading to bankruptcy and a failed business. It may have been the first time in my life I thought about this kind of consequences.
I did a tandem jump from 10,000 ft when I was a teenager. We exited the plane while flying through clouds (which is illegal IIRC) and tumbled out of control for the entire free fall period before the chute opened.
The exit was my fault. To initiate a jump, the pilot would count down from three and then scream "GO". With the door open it was very difficult to hear. Clouds were forming and we had already aborted twice, with my partner pulling us back into the plane each time.
On the third attempt I misread the shouts and hand signals and exited the plane before "GO". I was taller and heavier than my tandem partner so he probably had no choice.
We tumbled into thick, gray clouds. Without a horizon this made me nauseous. My partner was screaming from the moment we left the plane. I'd catch a word or two but most of his instruction was lost to the wind. We were totally out of control.
We exited the cloud still tumbling, my partner still screaming. I remember the chute opening, but we were never properly in control.
The next few minutes were glorious, though still nauseous, and the landing was uneventful.
I didn't think much of the consequences back then... But no more skydiving for me :-)
... which means you had a shitty tandem instructor . Shortly after a tandem pair leaves the door the instructor chucks a drogue which slows your terminal velocity to that of a single person and basically suspends the whole setup. Once that happens getting out the belly to earth position is basically impossible. The whole pulling back and description of your experience gives me an impression you were at a really sketchy drop zone.
