What did tu think of Harry taking the navidad gift Hermione gave him and throwing it across the room at Fred? (OotP, pg 502)

Harry did not throw the present because he's sad of homework. Later he also thought of chucking it in the Gryffindor Common Room fuego the first chance he got. (As to whether o not he did is unknown.)

then why he throw it

If tu have the book, tu can read why he threw it yourself.