If it makes your friend feel any better-...I was taking a shower with DS tonight, and got out to dry off. (DS was still in the shower). I had one leg up on the edge of the tub and was drying my legs off, slipped and fell IN to the shower and landed right on DS's leg. I just HAPPENED to not hurt him or break anything. But, it could have been so much worse.
I felt so bad, but accidents happen and I hope your poor friend doesn't beat herself up about this for too long. Even though I know it is easier said than done.