Karma??

I did a good thing today!! I saw a dog almost get hit on 4th Street today.  I pulled in the paint store's parking lot and convinced this beautiful dog that I wasn't going to eat him.  I was petting him and trying to figure out how to get him in my car so I could take him to the pound.  This guy came up and told me he knew who's dog it was and went to go see if she would come and get the dog.  He came back and told me he couldn't find the owner.  I figured I had to take him the pound or he was liable to get hit.  So as I went to go open up the back of the car, he took off!  I went into the paint store and asked them to call animal control.  They agreed and I walked out of the store.  I totally biffed it while walking off the curb.  I scraped up my knee and luckily I put out my right hand and not left when I landed or that could have been disastrous!! So I was backing out and that damn dog came back.  I went to go catch him and he ran off again.  The FPD officer who was writing some lady a ticket helped me catch him and he took care of getting him to the pound.  

So my question is, why did I get hurt while I was trying to do a good deed??  I mean I know I am walking disaster, but still....you'd think God would grant me a break!!