[Weekly Post] Theory Thursday-small detail, big HC

Greetings Radiant ones and welome to another edition of Theory Thursday. Today's question. What small detail lead you to a big Head Canon? Did you wonder why the squirrels hated the music? Why the harpies nested roght there? Perhaps it was why was the "Amulet of Silvanus" hidden under a rock, on a private beach? Whatever small detail you had, that lead to a big HC, tell us. And share the HC. Long posts are welcome.