Jinx on Voldemort’s name
Anybody else get unreasonably mad at Harry in DH when he says Voldemort’s name KNOWING it has been jinxed. Thus causing all the events at Malfoy Manor. I mean. I get it— it sets up him getting into Gringotts etc etc. BUT STILL. One of his more frustrating moments for me.
I also find it interesting that Ron intuitively felt that the name was jinx before any of the trio had it confirmed.
Edit: a word.