<human>: Can you succinctly summarize the text in 1-3 sentences?

I gave my dog a bath on Christmas, because she was due for one. But the day after Christmas I took her to a dog park, it was raining and she got filthy in the mud. I hosed her off, but I figured she was probably still dirty. So this morning we went for a run, and after the run I brought her in the shower with me for a quick shampoo and rinse. I don't usually do that with her, but I was in a hurry. I picked her up to hold her under the stream and rinse her off. Suddenly I realized that I was tipping backwards and I started using one hand to grab at anything I could to stabilize myself, so I grabbed at the shower stream (obviously that didn't help). I didn't end up falling, but I strained my back so hard trying to counterbalance that one side has been sore all day. I realized that while I was holding my dog with her back against me, she had propped her back feet on the shower wall and pushed as hard as she could. She almost caused me to fall out of the shower and now my back is fudged up.
<bot>: my dog tried to kamikaze us both out of the shower and I screwed up my back stopping it from happening.