I hear the 'karma' statement,
...but I agree with the sentiment that it is a shame when anyone gets injured.
While working in the Trauma ICU back in 1995 I learned that injury is nothing to take lightly, even if it happens to an old enemy.
Dave was a patient who had done me wrong years earlier, and it was he who was all chewed up, physically, and I must say emotionally.
Pain meds didn't seem to begin to touch his pain. I knew he was nervous that I was his nurse.
I told him he had enough to work on with healing his body and forgave him for his past misdeeds.
You could see him relax and he was able to find a bit more peace.
I got over the loss long ago; and I thought at the time he'll likely be thinking of my 'forgiveness' every day as he struggles with his new limitations.
So, I guess that is a case of karma, too... hmmm.