Why Legolas?

[Eomer of the Rohirrim]

Boromir did turn bad, because he tried to attack Frodo; and he did turn heel because the marks were scared of him and hopeful that Frodo could escape the danger. TORE explains it: Boromir's eyes should have been fixed on Frodo, but I always pictured him as looking grave and determined here; not as some shivering wretch, like he is depicted in the film.