I was photographing a beautiful specimen of Flower crab spider (Thomisus onustus) when a careless Hoverfly (Diptera, basically a type of fly) has the insane idea of flying in front of it: the spider grabs its prey and begins to eat its parts soft, starting with the intestine.
Told in this way, perhaps it is not very pleasant, but this is Nature.
Flower crab spider - Thomisus onustus - Ragno camaleonte - Ragno granchio