I prevented an armed gun (who was currently in the act of robbing a business along with his partner) from shooting three teenagers that were unwittingly walking into the situation.
I was inside, being robbed, and I could see the children approaching through the windows.
The larger of the two gunmen made the comment that if anyone comes in he was going to start shooting.
I put myself between him and the door and told him I couldn't let that happen. At that point I was pretty much consigned to my fate. In my head I had it worked out like this. "He's going to shoot me, kill me and the kids will hear it and run away... Or, he's not going to shoot me and I'll be able to prevent them from getting inside."
The guy put the gun to my head, stuff happened and the guy ended up falling on me. Unfortunatley for me, he was nearly 6'8" tall and weighed about 400lbs. I'm only 5'10" tall and when this happened I weight about 185lbs.
It was like having a pallet of bricks dropped on my shoulders. His weight pushed my femur through my tibia plateau and caused a severe compound fracture and internal dislocation. In other words, my leg shrank by six inches in the span of a heartbeat.
It put me in a wheelchair for about 18 months, it took me about 3 years to learn how to walk again correctly and without the use of a walker, cane or crutch. It caused me to have PTA in my knee, which is spreading to my hip and ankle. It also caused me to have some PTSD which in turn has caused clinical insomnia.
I've had 10 operations total on my knee, so far. Went through 3 sets of hardware. I'm scheduled to have a complete knee replacement near the end of next month because I'm grinding bone at this point as my medial cartilage is completely gone now.
Because of all of this my health has suffered greatly. Firstly, I got fat because my lifestyle became very sedentary. Secondly, I gained liver disease as a side affect from medications I was given early on in my treatments (medications which are no longer on the market, but the damage is done). Thirdly, I've gained a nice bit of anxiety, mainly from the PTSD and insomnia.
But, that's all behind me at this point. Come next month, the knee is getting replaced and I'm going to hit r/c25k for some inspiration. As this will be the first time in 10 years that I'll be able to run again. I can't wait.
TL;DR Saved some lives, ended up a crippled.