[quote=@MelonHead]
Well, she probably just wouldn't lie on her back.

If she got knocked on her back, her tail would just be an advantage in getting up, or it would naturally turn her to one side or the other. If she's getting hit into the ground hard enough that her tail would be damaged, she has bigger problems, probably her broken ribs. 
[/quote]

I wasn't thinking her tail damaged, but the floor getting an indent for the tail to rest in! :lol That's a staple of high powered fights. The fighter is okay but the environment around them is destroyed to fit their shape.

You know what? What you said is so simple I should have thought of it earlier. Being relatively round-ish, the tail should indeed tilt her hips off to one side rather than pushing the hips straight up unless they hit dead center and remained perfectly balanced, which is unlikely. She'd also still technically be on her back, just a tad twisted up that doesn't look silly at all. Uncomfortable to be sure, but getting knocked down to begin with is the bigger worry. Crisis averted everyone! I was going to have to try to draw her lying down to make sense how the tail would interfere. This drawing would be in my book, "the vital guide of characters and the useless facts pertaining to them that could be handy to know, maybe".