Lord of The Rings: Fellowship of The Ring - Open or Closed?
When Boromir walks towards Merry and Pippin to rescue them in a brief shot, his elven-cloak is open. In the next shot the cloak is perfectly sealed with the broach again.
That's not the buckle of his elven-cloak, it's the top buckle of that black vest thingy he wears over his shirt with the red sleeves (look at me be all technical with clothing words!). It's easy to confuse because the top buckle of the vest is also in the shape of a lead or arrowhead.