That is the sort of thing that annoys me too, along with characters casually tearing up clothing with their hands (go ahead, try to tear even a t-shirt that isn't worn out!). Oh, and so many heroines who hate embroidery. So very tired of that trope as a shorthand for "she doesn't want to sit around and do girly things; she wants Adventure". Just lazy story-telling.

I won't even go into the many abuses of horses in some author's hands. No, you can't ride them for hours without a rest. No, they don't act like big dogs. No, you bloody well can't cut the girth of a horse you're riding at a gallop and both stay on and not cut the horse. (Just read that one this weekend, gah.) Etc. Etc.