I just hurt my back farting at the dog.

One of my mom's dogs has a gas problem, and it gets annoying. So when I was walking by the dog and realized I had to fart I decided to get some payback. As I bent a little closer I had a back spasm (I'm old, it happens) and I fell over hitting my back on the corner of the wall. So now I'm sitting here with an icepack on my back, not able to walk.