One rather memorable event in the Shinto creation narrative is that Amaterasu retreated into her cave (the Ama-no-Iwato) after Susanoo did a bunch of awful things to her. One of the things Susanoo did was throw a flayed horse at her.
Now, I can see why anybody would be unhappy about having a flayed horse thrown at them, but I can't help but wonder if there's some subtext here that I'm missing. Why specifically a flayed horse? For example, was it the case that the horse was an animal sacred to Amaterasu? Or, contrariwise, was the horse perhaps seen as an "unclean" animal, whereby having one thrown at you was some sort of grievous insult?